Aerosol-generating article having multiple air intake zones

Abstract

An aerosol generating article (1) for generating aerosols upon heating is provided. The aerosol generating article includes an aerosol forming matrix strip (12) and a filter positioned downstream of the aerosol forming matrix strip. The aerosol forming matrix strip and the filter are assembled within packaging material (22). The aerosol generating article includes a first air inlet area (15) and a second air inlet area (115) located on the packaging material. The first air inlet area and the second air inlet area are each configured to allow air to enter the interior of the aerosol generating article. The first air inlet area is located at a first position along the aerosol generating article, and the second air inlet area is located at a second position along the aerosol generating article. An aerosol generating system (100) is also provided, which includes an aerosol generating article and an aerosol generating device (10).

Description

Technical Field

[0001] This invention relates to an aerosol generating article for producing aerosols upon heating. An aerosol generating system, comprising an aerosol generating article and an aerosol generating apparatus, is also described herein. Background Technology

[0002] Aerosol-generating articles are known in the art in which an aerosol-forming matrix, such as a tobacco-containing matrix, is heated rather than burned. Typically, in such heated aerosol-generating articles, aerosols are generated by transferring heat from a heat source to a physically separated aerosol-forming matrix or material, which may be positioned in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-forming matrix through heat transfer from the heat source and entrained in the air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.

[0003] Numerous prior art documents disclose aerosol generating apparatuses for consuming aerosol generating articles. Such apparatuses include, for example, electrically heated aerosol generating apparatuses, wherein aerosols are generated by transferring heat from one or more electrically heated elements of the aerosol generating apparatus to the aerosol forming matrix of the heated aerosol generating article.

[0004] Typically, aerosol-generating articles are specifically designed for use with particular aerosol-generating devices, or aerosol-generating devices are specifically designed for use with particular aerosol-generating articles. In particular, it may be required that certain aerosol-generating articles not be used with certain aerosol-generating devices. This may be because some articles are suitable for heating by the heating elements of a particular aerosol-generating device, as such devices may overheat some aerosol-generating articles or fail to heat others.

[0005] Therefore, it is desirable to provide aerosol generating articles suitable for use in aerosol generating systems, wherein the use of aerosol generating articles incompatible with aerosol generating devices is prevented. Summary of the Invention

[0006] This specification provides an aerosol generating article for generating aerosols upon heating. The aerosol generating article includes an aerosol forming matrix strip and a filter positioned downstream of the aerosol forming matrix strip. The aerosol forming matrix strip and the filter are assembled within packaging material. The aerosol generating article includes a first air inlet area and a second air inlet area located on the packaging material. The first air inlet area and the second air inlet area are each configured to allow air to enter the interior of the aerosol generating article.

[0007] This specification provides an aerosol generating article for generating aerosols upon heating. The aerosol generating article may include an aerosol forming matrix strip. The aerosol generating article may include a filter positioned downstream of the aerosol forming matrix strip. The aerosol forming matrix strip and the filter may be assembled within packaging material. The aerosol generating article may include a first air inlet area and a second air inlet area located on the packaging material. The first air inlet area and the second air inlet area may each be configured to allow air to enter the interior of the aerosol generating article. The first air inlet area may be located at a first position along the aerosol generating article. The second air inlet area may be located at a second position along the aerosol generating article. The second air inlet area may be located downstream of the first air inlet area. One of the first air inlet area and the second air inlet area may be positioned along a hollow tubular segment.

[0008] The first air inlet zone may be located at a first position along the aerosol forming matrix strip, and the second air inlet zone may be located at a second position downstream of the aerosol forming matrix strip.

[0009] This specification provides an aerosol generating article for generating an aerosol upon heating. The aerosol generating article may include an aerosol forming matrix strip. The aerosol generating article may include a downstream section positioned downstream of the aerosol forming matrix strip. The aerosol forming matrix strip and the downstream section may be assembled within packaging material. The aerosol generating article may include a first air inlet area and a second air inlet area located on the packaging material. The first air inlet area and the second air inlet area may each be configured to allow air to enter the interior of the aerosol generating article. The first air inlet area may be located at a first position along the aerosol generating article. The second air inlet area may be located at a second position along the aerosol generating article. The second air inlet area may be located downstream of the first air inlet area.

[0010] Aerosol-generating articles may include aerosol forming agents. The aerosol-forming matrix may have an aerosol forming agent content of more than about 10% on a dry weight basis.

[0011] By providing this relatively high aerosol forming agent content, aerosol formation is facilitated, particularly in the context of heated aerosol-generating articles. The aerosol forming agent content, together with the provision of a first and second air inlet zones placed at a distance from each other, improves aerosol nucleation, which in turn provides a satisfactory amount of aerosol delivery to the user at relatively low temperatures experienced in aerosol-generating articles constructed to generate aerosols upon heating without combustion. Furthermore, despite the low operating temperature, cooling may still be required downstream of the aerosol-forming matrix. Providing a second downstream air inlet zone assists this cooling effect by providing ventilation and by providing aerosol forming agent to enhance aerosol nucleation during use. These improved aerosol delivery benefits (through improved cooling and aerosol nucleation) are further enhanced in cases where at least one air inlet zone is relatively wide (e.g., by including a substantially porous portion of the packaging material) or where the aerosol-forming matrix includes homogenized tobacco material.

[0012] The filter or downstream section may include a hollow tubular segment. The hollow tubular segment may be located downstream of the aerosol-forming matrix strip. The hollow tubular segment may be located immediately downstream of the aerosol-forming matrix strip.

[0013] The first or second air inlet zone can be located along the hollow tubular segment. The second air inlet zone can be located along the hollow tubular segment. The first air inlet zone can be located at a first position along the aerosol-forming matrix strip, and the second air inlet zone can be located along the hollow tubular segment.

[0014] Aerosol generating articles can be configured for use with specific aerosol generating apparatus to form an aerosol generating system. This disclosure also relates to such aerosol generating systems. As used herein, the term "aerosol generating apparatus" refers to an apparatus including a heating element that interacts with an aerosol forming matrix of the aerosol generating article to generate an aerosol.

[0015] The aerosol generating apparatus of the aerosol generating system may have a distal end and an inlet end. The aerosol generating apparatus may include a housing. The housing may define a device cavity for removably receiving an aerosol-generating article at the inlet end of the apparatus. The aerosol generating apparatus may include a heater for heating the aerosol-forming matrix when the aerosol-generating article is received within the device cavity. The aerosol generating apparatus may include an airflow passage extending between a channel inlet and a channel outlet. The airflow passage may be configured to establish fluid communication between the interior of the device cavity and the exterior of the aerosol generating apparatus. The aerosol generating system or apparatus may be configured such that, when the aerosol-generating article is received within the device cavity, fluid communication between the interior of the aerosol-generating article and the exterior of the aerosol generating apparatus may be established through fluid communication between a first air inlet region of the aerosol-generating article received within the device cavity and the airflow passage of the aerosol generating apparatus.

[0016] In order to consume the aerosol-generating article of the present invention and generate aerosols within the aerosol-generating device of the aerosol-generating system, a fluid communication must be established between the interior of the aerosol-generating article and the exterior of the aerosol-generating device. During consumption, the user can inhale the aerosol-generating article, allowing the user to experience and consume the aerosols generated within the article. Through this inhalation action, air can flow from the exterior of the aerosol-generating device through the device, into the article, and through it, thereby delivering the aerosols generated within the article to the user's mouth.

[0017] By constructing an aerosol generation system, fluid communication between the interior of the aerosol-generating article and the exterior of the aerosol-generating device is established through a fluid communication between the first air inlet area of ​​the aerosol-generating article received within the device cavity and the airflow channel of the aerosol-generating device, ensuring that compatible aerosol-generating articles and aerosol-generating devices can be used together. For use in the aerosol-generating system of the present invention, a compatible aerosol-generating article needs to have a first air inlet area, which is constructed such that when the aerosol-generating article is received within the device cavity, fluid communication is established between the first air inlet area of ​​the aerosol-generating article and the airflow channel of the aerosol-generating device. Furthermore, a compatible aerosol-generating device needs to have an airflow channel, which is constructed such that it establishes fluid communication with the first air inlet area of ​​the aerosol-generating article received within the device.

[0018] Fluid communication between the interior of the aerosol-generating article and the exterior of the aerosol-generating device can be established through the outlet of the airflow channel of the aerosol-generating device, which covers or overlaps the first air inlet area of ​​the aerosol-generating article received within the device cavity. Therefore, a compatible aerosol-generating article needs to have a first air inlet area constructed such that, when the aerosol-generating device is received within the device cavity, the outlet of the airflow channel of the aerosol-generating device covers or overlaps the first air inlet area of ​​the aerosol-generating article. Furthermore, a compatible aerosol-generating device needs to have an airflow channel constructed such that, when the aerosol-generating article is received within the device, the outlet covers or overlaps the first air inlet area of ​​the aerosol-generating article.

[0019] If an incompatible aerosol generating article is used with an aerosol generating device of a currently disclosed aerosol generating system, the user may be unable to use the aerosol generating system and may not be able to consume or at least fully experience the incompatible aerosol generating article. Furthermore, if a compatible aerosol generating article is used with a different aerosol generating device not belonging to the aerosol generating system of this disclosure, the user may also be unable to use the aerosol generating system and may not be able to consume or at least fully experience the compatible aerosol generating article. This is because if the airflow channel outlet of the aerosol generating device is not aligned with the first air inlet area of ​​the aerosol generating device, fluid communication between the interior and exterior of the aerosol generating device may not be properly or completely established.

[0020] Fluid communication between the exterior of the aerosol generating device and the interior of the aerosol-generated article can be established by partially or completely overlapping or aligning the outlet of the airflow channel of the device with the first air inlet zone of the article.

[0021] Fluid communication between the exterior of the aerosol generating device and the interior of the aerosol-generated article can be established by partially or completely overlapping or aligning the airflow channel of the device with the first air inlet zone of the article.

[0022] The first air inlet zone is located at a first position along the aerosol forming matrix strip, and the second air inlet zone is located at a second position downstream of the aerosol forming matrix strip.

[0023] By providing a first air inlet area located at a first position along the aerosol forming matrix strip and a second air inlet area located at a second position downstream of the aerosol forming matrix strip, the aerosol generating article of the present invention can provide both a main air inlet area along the aerosol forming matrix strip and a ventilation area downstream of the aerosol forming matrix strip. During use in a compatible aerosol generating apparatus, the first air inlet area allows most of the air to enter the aerosol generating article, while the second air inlet area provides ventilation to the generated aerosol flow to cool the flow and improve the consumer experience.

[0024] As used herein, the term "longitudinal" refers to the direction corresponding to the main longitudinal axis of the aerosol generating article or apparatus, which extends between the upstream and downstream ends of the aerosol generating article or apparatus.

[0025] As used herein, the terms “upstream” and “downstream” describe the relative position of an element or part of an aerosol generating article or apparatus with respect to the direction in which the aerosol is transported through the aerosol generating article during use.

[0026] The term "mouth end" refers to a portion of an element or component that is configured to be located in or near a user's mouth during normal use. The mouth end of a component may also correspond to a downstream end of the same component. For example, the mouth end of an aerosol generating article may also be the downstream end of the article. The mouth end of an aerosol generating article or device is configured to be placed in or near a consumer's mouth during normal use. The mouth end of an aerosol generating device may also be referred to as the proximal end of the aerosol generating device.

[0027] During use, air is primarily drawn longitudinally through the aerosol to generate the product. Outside the device, air can also be drawn through the product via the upstream end.

[0028] The term "transverse" refers to a direction perpendicular to the longitudinal axis. Unless otherwise stated, any reference to the "cross section" of an aerosol-generating article or a component of an aerosol-generating article refers to a transverse section.

[0029] The term "length" refers to the dimension of a component of an aerosol-generating article or apparatus relative to the longitudinal direction.

[0030] The device cavity may be referred to as the heating chamber of the aerosol generating apparatus. The device cavity may extend between a distal end and an inlet or proximal end. The distal end of the device cavity may be a closed end, while the inlet or proximal end may be an open end. The aerosol-generating article may be inserted into the device cavity or heating chamber via the open end of the device cavity. The device cavity may be cylindrical to conform to the same shape as the aerosol-generating article.

[0031] The phrase "received within" can refer to the fact that a component or element is wholly or partially received within another component or element. For example, the phrase "the aerosol generating article is received within a device cavity" means that the aerosol generating article is wholly or partially received within the device cavity of the aerosol generating article. When the aerosol generating article is received within a device cavity, the aerosol generating article may be adjacent to the distal end of the device cavity. When the aerosol generating article is received within a device cavity, the aerosol generating article may be substantially close to the distal end of the device cavity. The distal end of the device cavity may be defined by an end wall.

[0032] The length of the device cavity can be between approximately 10 mm and approximately 50 mm. The length of the device cavity can be between approximately 20 mm and approximately 40 mm. The length of the device cavity can be between approximately 25 mm and approximately 30 mm. The length of the device cavity can be equal to or greater than the length of the aerosol forming matrix strip.

[0033] The diameter of the device cavity can be between approximately 4 mm and approximately 50 mm. The diameter of the device cavity can be between approximately 4 mm and approximately 30 mm. The diameter of the device cavity can be between approximately 5 mm and approximately 15 mm. The diameter of the device cavity can be between approximately 6 mm and approximately 12 mm. The diameter of the device cavity can be between approximately 7 mm and approximately 10 mm. The diameter of the device cavity can be between approximately 7 mm and approximately 8 mm.

[0034] The diameter of the device cavity can be equal to or greater than the diameter of the aerosol-generating product. Alternatively, the diameter of the device cavity can be the same as the diameter of the aerosol-generating product to ensure a tight fit.

[0035] The apparatus cavity can be configured to establish a tight fit with the aerosol-generating article received within the apparatus cavity. A tight fit can refer to a close fit. The aerosol-generating apparatus may include a peripheral wall. The material peripheral wall may define the apparatus cavity or a heating chamber. The peripheral wall defining the apparatus cavity can be configured to engage with the aerosol-generating article received within the apparatus cavity in a tight fit manner, such that when the aerosol-generating article is received within the apparatus, there is substantially no gap or void between the peripheral wall defining the apparatus cavity and the aerosol-generating article.

[0036] Such a tight fit can establish an airtight fit or configuration between the device cavity and the aerosol generating article received therein. This airtight configuration may mean that air can only be drawn into the interior of the aerosol generating article through alignment or overlap with the first air inlet area via the airflow channel outlet. With this airtight configuration, there will be essentially no gaps or voids for airflow between the peripheral walls defining the device cavity and the aerosol generating article. Therefore, when incompatible aerosol generating articles are used with the aerosol generating device, such alignment may not occur, and thus air may not be drawn through the incompatible aerosol generating article.

[0037] A tight fit with the aerosol-generating article can be established along the entire length of the device cavity or a portion thereof. A tight fit can be established downstream of the first air inlet zone of the aerosol-generating article. The portion of the peripheral wall configured to establish such a tight fit can be referred to as a sealing portion of the peripheral wall. This type of tight fit can be established when the airflow passage is confined within the thickness of the peripheral wall of the aerosol-generating device. The sealing portion of the peripheral wall can be defined along the entire length of the device cavity.

[0038] When the airflow channel is defined on the inner surface of the peripheral wall of the device housing, a portion of the peripheral wall between the airflow channel and the distal end of the device cavity can define a sealing portion of the peripheral wall. This ensures that air does not flow upstream of the aerosol-generating article beyond the airflow channel. When received within the device, the portion of the peripheral wall between the airflow channel and the distal end of the device cavity can form an airtight configuration with the upstream portion of the aerosol-generating article.

[0039] The sealing portion of the peripheral wall can be configured to establish an airtight fit with a portion of the aerosol-generating article at a location downstream of the first air inlet zone of the aerosol-generating article. The sealing portion of the peripheral wall can also be configured to establish an airtight fit with a portion of the aerosol-generating article at a location downstream of the second air inlet zone of the aerosol-generating article.

[0040] The diameter of the device cavity can vary along the longitudinal direction of the aerosol generating device. The diameter of the device cavity can decrease from the distal end of the device cavity to the sealed portion of the peripheral wall.

[0041] The diameter of the device cavity can increase from the sealing portion of the peripheral wall towards the distal end of the device cavity. The diameter of the device cavity between the distal end of the device cavity and the sealing portion of the peripheral wall can be larger than the diameter of the rest of the device cavity. The diameter of the device cavity can increase in the direction away from the sealing portion of the peripheral wall and away from the opening end of the device.

[0042] By having a portion of the device cavity have one or more diameters larger than the rest of the device cavity, the device cavity can define a gap or chamber around (surround) the upstream portion of the aerosol-generating article when it is received within the device. In such embodiments, alignment or overlap between the first air inlet area and the first outlet of the device's airflow passage may not be necessary to ensure fluid communication between the exterior of the device and the interior of the article. Airflow still needs to enter the article via the first air inlet area. Air flowing into the device cavity via the first outlet of the airflow passage can flow into such a gap or chamber and then be drawn into the article via the first air inlet area. Such a gap or chamber can provide an air cushion around the upstream portion of the article, which can be heated by the device's heater or act as a cushion of cooling air surrounding the article.

[0043] The aerosol generating apparatus may include a peripheral wall defining an apparatus cavity, and the aerosol generating apparatus may include a circumferential protrusion extending from the peripheral wall into the apparatus cavity, the circumferential protrusion being configured to establish an airtight fit with a portion of the aerosol generating article at a location downstream of a first air inlet zone of the aerosol generating article when received within the aerosol generating apparatus.

[0044] The diameter of the device cavity can be larger than the diameter of the aerosol-generated article, and the inner diameter of the circumferential protrusion can be the same as the diameter of the aerosol-generated article, ensuring a tight fit between the article and the circumferential protrusion once the article is received within the aerosol-generating device. The inner diameter of the circumferential protrusion can even be smaller than the diameter of the aerosol-generated article. This ensures a more reliable airtight fit.

[0045] By establishing an airtight fit with the aerosol-generating article downstream of the first air inlet zone, it is further ensured that air can only enter the interior of the aerosol-generating article through the alignment of the airflow channel outlet and the first air inlet zone. This can be achieved through a sealing portion of the peripheral wall or a circumferential protrusion, both of which have been described above.

[0046] When the aerosol-generating article is received within the apparatus cavity, its upstream end can be blocked, thereby substantially preventing air from entering the aerosol-generating article through its upstream end. However, when the aerosol-generating article is not received within the aerosol-generating apparatus, air can flow through its upstream end. When the article is received or inserted into the apparatus, its upstream end may surround the distal end of the apparatus cavity, preventing air from flowing through it. Therefore, air flowing through the airflow channel may only be drawn through the article via the first air inlet area. The upstream end of the aerosol-generating article may be defined by the upstream end of the aerosol-forming matrix strip.

[0047] An aerosol generating apparatus may include an airflow passage extending between a channel inlet and a channel outlet. The airflow passage may be configured to establish fluid communication between the interior of the apparatus cavity and the exterior of the aerosol generating apparatus. The airflow passage of the aerosol generating apparatus may be defined within the housing of the aerosol generating apparatus to allow fluid communication between the interior of the apparatus cavity and the exterior of the aerosol generating apparatus. When an aerosol-generated article is received within the apparatus cavity, the airflow passage may be configured to supply airflow to the article to deliver the generated aerosol to a user who inhales it from the mouth end of the article.

[0048] The airflow passage of the aerosol generating device may be defined within or by the peripheral wall of the device housing. In other words, the airflow passage may be defined within the thickness of the peripheral wall or by the inner surface of the peripheral wall, or a combination of both. The airflow passage may be partially defined by the inner surface of the peripheral wall and may also be partially defined within the thickness of the peripheral wall. The inner surface of the peripheral wall defines the outer peripheral boundary of the device cavity.

[0049] The airflow passage of the aerosol generating apparatus can extend from an inlet located at the inlet or proximal end of the aerosol generating apparatus to an outlet away from the inlet of the apparatus. The airflow passage can extend in a direction parallel to the longitudinal axis of the aerosol generating apparatus. The outlet of the airflow passage is configured such that when a compatible aerosol-generated article is received within the apparatus cavity, the outlet covers the first air inlet zone of the article.

[0050] The airflow channel may have more than one outlet, with one outlet for each air inlet zone in an article configured for use with an aerosol generating apparatus. For example, if the aerosol generating article includes a first air inlet zone and a second air inlet zone, then when the aerosol generating article is fully received within the aerosol generating apparatus, the corresponding airflow channel of the aerosol generating apparatus may have at least one first outlet for covering the first air inlet zone and at least one second outlet for covering the second air inlet zone. Therefore, the aerosol generating system may be configured such that when the aerosol generating article is received within the apparatus cavity, fluid communication between the interior of the aerosol generating article and the exterior of the aerosol generating apparatus is established through fluid communication between the first and second air inlet zones of the aerosol generating article received within the apparatus cavity and the airflow channel of the aerosol generating apparatus.

[0051] When the airflow passage is defined within the peripheral wall of the device, the airflow passage may include a first portion extending axially from the passage inlet and a second portion extending laterally or radially from the end of the first portion to the passage outlet. Therefore, the airflow passage may include elbows or bends to connect the inlet and outlet of the airflow passage. If the airflow passage includes more than one outlet along its length, the airflow passage may include additional passage portions extending laterally from the first portion to each of the additional outlets. In cases where the airflow passage includes a single outlet, the airflow passage may include an L-shaped elbow or bend.

[0052] When the airflow channel is defined by the inner surface of the peripheral wall, the length of the airflow channel can be directly exposed to the device cavity; that is, the longitudinal side of the airflow channel can be open to the device cavity. The thickness of the portion of the peripheral wall defining the airflow channel can be less than the thickness of the remaining portion of the peripheral wall. The diameter of the portion of the peripheral wall defining the airflow channel can be greater than the diameter of the remaining portion of the peripheral wall. In such embodiments, the airflow channel can be annular, such that the airflow channel surrounds the device cavity and the aerosol generated within the device cavity.

[0053] In embodiments where the airflow channel is defined by the inner surface of the peripheral wall of the housing, the entire length of the airflow channel may be exposed to or open into the device cavity, and thus exposed to the aerosol generating article received within the device. In such embodiments, to establish fluid communication between the exterior of the aerosol generating device and the interior of the aerosol generating article, the airflow channel is configured to cover all air inlet areas of the compatible aerosol generating article. In such embodiments, the outlet of the airflow channel can be considered the open side of the airflow channel; that is, the side of the airflow channel is exposed to or open into the device cavity.

[0054] The length of the airflow channel can be less than the length of the device cavity. The length of the airflow channel refers to the longitudinal or axial distance of the airflow channel.

[0055] The airflow channel can be configured such that a first outlet of the airflow channel is aligned with or covers a first air inlet area of ​​the aerosol-generating article received within the device cavity. The airflow channel can extend from a first inlet located at the port end of the housing of the aerosol generating device to a first outlet. The first or any outlet of the airflow channel can be located between the distal end of the device cavity and the port end.

[0056] The first outlet may be located at least about 2 mm from the distal end of the device cavity. The first outlet may be located at least about 3 mm from the distal end of the device cavity. The first outlet may be located at least about 5 mm from the distal end of the device cavity. The first outlet may be located at least about 7 mm from the distal end of the device cavity.

[0057] When the article is received in the device cavity, the distance from the first outlet to the distal end of the device cavity and the distance from the first air inlet area to the distal end of the device cavity can be similar or the same. When the article is received in the device cavity, the distance from the other outlet of the airflow channel to the distal end of the device cavity and the distance from the other air inlet area to the distal end of the device cavity can be similar or the same. When the article is received in the device cavity, the distance from the distal end of the airflow channel to the distal end of the device cavity and the distance from the air inlet area to the distal end of the device cavity can be similar or the same.

[0058] The first outlet may be located no more than about 25 mm from the distal end of the device cavity. The first outlet may be located between about 3 mm and about 20 mm from the distal end of the device cavity. The first outlet may be located between about 5 mm and about 18 mm from the distal end of the device cavity. The first outlet may be located between about 7 mm and about 16 mm from the distal end of the device cavity. The airflow passage may not extend beyond the distal end of the device cavity.

[0059] The length of the airflow channel can be approximately 23 mm. The length of the airflow channel can be between approximately 3 mm and approximately 100 mm. The length of the airflow channel can be between approximately 8 mm and approximately 70 mm. The length of the airflow channel can be between approximately 10 mm and approximately 50 mm. The length of the airflow channel can be between approximately 12 mm and approximately 40 mm. The length of the airflow channel can be between approximately 12 mm and approximately 40 mm. The length of the airflow channel can be between approximately 15 mm and approximately 30 mm. The length of the airflow channel can be between approximately 20 mm and approximately 25 mm.

[0060] If the compatible aerosol generating article includes a first air inlet zone located downstream of the aerosol forming matrix strip, the length of the airflow channel may be between about 8 mm and about 25 mm. The length of the airflow channel may be between about 10 mm and about 15 mm. The length of the airflow channel may be between about 11 mm and about 13 mm.

[0061] The diameter of the airflow channel can be between approximately 0.1 mm and approximately 5 mm. The diameter of the airflow channel can be between approximately 0.5 mm and approximately 4 mm. The diameter of the airflow channel can be between approximately 1 mm and approximately 3 mm. The diameter of the airflow channel can be between approximately 1.5 mm and approximately 2.5 mm. The diameters of the airflow channel and its outlet and inlet can be the same or different.

[0062] The "length" of an airflow channel can refer to the length of the airflow channel extending in the longitudinal direction.

[0063] An aerosol generating device may have multiple airflow channels, each having at least one inlet and at least one outlet. These multiple airflow channels may be evenly and circumferentially distributed around the device cavity.

[0064] One or each airflow passage may include a single inlet and multiple outlets. In such embodiments, there may be an outlet corresponding to each air inlet zone disposed on an aerosol generating article configured to be received within an aerosol generating apparatus.

[0065] As described above, the aerosol generating article according to the present invention includes an aerosol forming matrix strip and a filter or downstream section located downstream of the aerosol forming matrix strip.

[0066] The aerosol generating article may further include an upstream section located upstream of the aerosol generating matrix strip. The upstream section may include one or more upstream elements. In some embodiments, the upstream section may include an upstream element disposed immediately upstream of the aerosol generating element. The upstream element may extend from an upstream end of the aerosol generating matrix to an upstream end of the aerosol generating article. The upstream element may be adjacent to the upstream end of the aerosol generating article. The upstream element may be referred to as the upstream section. The aerosol generating article may include an air inlet located at the upstream end of the aerosol generating article. Where the aerosol generating article includes an upstream element, the air inlet may be provided through the upstream element. Air entering through the air inlet may enter the aerosol generating matrix to generate a mainstream aerosol.

[0067] The porosity or permeability of the upstream section can be advantageously varied in order to provide the desired total suction resistance for the aerosol-generated product.

[0068] In some embodiments, the upstream section may be formed of an impermeable material. In such embodiments, the aerosol generating article may be configured such that air flows into the aerosol generating matrix strip through a suitable ventilation device disposed in the packaging material.

[0069] The upstream section can be made of any material suitable for aerosol-generating articles. For example, the upstream element may include a material rod. Suitable materials for forming the upstream section include filter materials, ceramics, polymer materials, cellulose acetate, cardboard, zeolite, or aerosol-generating matrices. Preferably, the upstream section includes a rod containing cellulose acetate.

[0070] In cases where the upstream section includes a material rod, the downstream end of the material rod may surround the upstream end of the aerosol-generating matrix. For example, the upstream section may include a rod comprising cellulose acetate adjacent to the upstream end of the aerosol-generating matrix. This can advantageously help maintain the aerosol-generating matrix in place.

[0071] In cases where the upstream section includes a material rod, the downstream end of the material rod may be spaced apart from the upstream end of the aerosol generating matrix. The upstream element may include a rod containing fiber filter material.

[0072] The upstream section may have a length of at least about 1 millimeter. For example, the upstream section may have a length of at least about 2 millimeters, at least about 4 millimeters, or at least about 6 millimeters.

[0073] The upstream section may have a length not exceeding approximately 15 millimeters. For example, the upstream section may have a length not exceeding approximately 12 millimeters, not exceeding approximately 10 millimeters, or not exceeding approximately 8 millimeters.

[0074] The upstream section may have a length between about 1 mm and about 15 mm. For example, the upstream section may have a length between about 2 mm and about 12 mm, between about 4 mm and about 10 mm, or between about 6 mm and about 8 mm.

[0075] The upstream section or component may include a hollow tubular segment.

[0076] The filter or downstream section may include a mouthpiece segment containing a filter material and a hollow tubular segment located between the aerosol forming matrix strip and the mouthpiece segment. All three elements may be longitudinally aligned. The aerosol forming matrix strip may include at least one aerosol forming agent. The hollow tubular segment may be a support segment or a cooling segment. The hollow tubular segment may be positioned or located immediately downstream of the aerosol forming matrix.

[0077] The filter or downstream section may include a mouthpiece segment containing a filter material section and an aerosol cooling section (or element) located between the aerosol forming matrix strip and the mouthpiece segment. All three elements may be aligned longitudinally.

[0078] The mouthpiece segment may include a hollow tubular segment. The mouthpiece segment may also be a filter segment made of filter material.

[0079] As used herein, an "aerosol cooling element" can refer to a component of an aerosol-generating article positioned downstream of an aerosol-forming matrix such that, during use, aerosols formed from volatile compounds released from the aerosol-forming matrix pass through and are cooled by the aerosol cooling element before being inhaled by the user. Aerosol cooling elements have a large surface area but result in a low pressure drop. Aerosol cooling elements can function to cool the temperature of the aerosol stream drawn through the element by heat transfer. The components of the aerosol will interact with the aerosol cooling element and lose heat energy.

[0080] Aerosol cooling elements may include sheet materials selected from the group consisting of: metal foil, polymer sheets, and substantially non-porous paper or paperboard. In some embodiments, aerosol cooling elements may include sheet materials selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminum foil.

[0081] After consumption, aerosol-generating articles are typically disposed of. It may be advantageous for the components forming the aerosol-generating articles to be biodegradable. Therefore, it may be advantageous for aerosol cooling elements to be formed from biodegradable materials, such as non-porous paper or biodegradable polymers, such as polylactic acid or... Grade (commercially available starch-based copolyester family). In some embodiments, the entire aerosol-generating product is biodegradable or compostable.

[0082] In some embodiments, the aerosol generating article according to the invention may include additional support elements (or support segments) arranged between and longitudinally aligned with the aerosol forming matrix strip and the hollow tubular segment or aerosol cooling segment (or element). More specifically, the support element (or support segment) may be located immediately downstream of the strip and immediately upstream of the hollow tubular segment or aerosol cooling element. The additional support element or segment may be tubular.

[0083] Packaging materials for aerosol-generating articles may include airtight materials. Packaging materials for aerosol-generating articles may also include airtight materials. By providing aerosol-generating articles with airtight or airtight materials, it is ensured that air must be drawn in through a first air inlet area so that air can enter the aerosol-generating article when the upstream end of the aerosol-generating article is blocked upon insertion into the device cavity or heating chamber of an aerosol-generating apparatus. In other words, it is ensured that the first air inlet area defines the main and only air intake portion of the article through which air can be drawn into the article.

[0084] The terms "airtight material" or "impermeable material" are used throughout this specification to mean a material that substantially does not allow fluids, especially air and fumes, to pass through its pores or voids. For example, if a packaging material is formed of an airtight and aerosol particle material, then air and aerosol particles inhaled into the article cannot flow through the packaging material. In contrast, the term "porous" is used herein to refer to a material that provides multiple pores or openings that allow air to pass through it.

[0085] By providing packaging materials with impermeable materials, when the article is received in the aerosol generating device, air can only enter the interior of the aerosol-generated article through a first air inlet zone provided in the packaging material.

[0086] The first air inlet zone may be located at the (first) position along the aerosol-generated article.

[0087] The first air inlet zone of the aerosol-generated article can be positioned along the aerosol-forming matrix strip. The first air inlet zone can be located around the aerosol-forming matrix strip. Alternatively, the first air inlet zone of the aerosol-generated article can be located along the aerosol-forming matrix strip.

[0088] The first air inlet zone may be located downstream of the aerosol forming matrix strip. The first air inlet zone may be located downstream of the aerosol forming matrix strip or at least 1 mm away from it.

[0089] The first air inlet zone of the aerosol-generated article can be located along a hollow tubular segment. The first air inlet zone can be located around the hollow tubular segment. Alternatively, the first air inlet zone of the aerosol-generated article can be located along the hollow tubular segment.

[0090] The first air inlet zone of the aerosol-generated article can be positioned along the support segment. The first air inlet zone can be located around the support segment. Alternatively, the first air inlet zone of the aerosol-generated article can be located along the support segment. The support segment can be a hollow support segment.

[0091] The aerosol-generating article can extend between an upstream end and a downstream end. The downstream end of the article can coincide with the downstream end of the aerosol-forming matrix strip. In other words, the downstream end of the aerosol-forming matrix strip can define the downstream end of the aerosol-generating article.

[0092] The first air inlet zone may be located at least approximately 2 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 3 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 4 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 5 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 6 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 7 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 8 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 9 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 10 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located at least approximately 12 mm downstream of the upstream end of the aerosol forming matrix strip.

[0093] The first air inlet zone may be located approximately 20 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 15 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 14 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 13 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 12 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 10 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 9 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 8 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 6 mm or less downstream of the upstream end of the aerosol-forming matrix strip. The first air inlet zone may be located approximately 5 mm or less downstream of the upstream end of the aerosol forming matrix strip.

[0094] The first air inlet zone may be located between approximately 2 mm and approximately 20 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 3 mm and approximately 15 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 4 mm and approximately 12 mm downstream of the upstream end of the aerosol forming matrix strip.

[0095] The first air inlet zone may be located between approximately 2 mm and approximately 15 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 3 mm and approximately 12 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 5 mm and approximately 10 mm downstream of the upstream end of the aerosol forming matrix strip.

[0096] The first air inlet zone may be located between approximately 2 mm and approximately 12 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 3 mm and approximately 10 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 5 mm and approximately 8 mm downstream of the upstream end of the aerosol forming matrix strip.

[0097] The first air inlet zone may be located between approximately 2 mm and approximately 10 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 3 mm and approximately 9 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 5 mm and approximately 8 mm downstream of the upstream end of the aerosol forming matrix strip.

[0098] The first air inlet zone may be located between approximately 2 mm and approximately 8 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 2 mm and approximately 6 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may be located between approximately 2 mm and approximately 5 mm downstream of the upstream end of the aerosol forming matrix strip.

[0099] The first air inlet zone may be located between approximately 10 mm and approximately 20 mm downstream of the upstream end of the aerosol forming matrix strip. The first air inlet zone may also be located between approximately 12 mm and approximately 15 mm downstream of the upstream end of the aerosol forming matrix strip.

[0100] The first air inlet zone can be positioned along the upstream half of the aerosol forming matrix strip. By positioning the first air inlet zone along the upstream half of the aerosol forming matrix strip, air drawn through the first air inlet zone can be drawn through most of the length of the aerosol forming matrix strip, thereby optimizing aerosol generation and effectively utilizing the aerosol forming matrix.

[0101] The first air inlet zone can be located along the downstream half of the aerosol-forming matrix strip. The first air inlet zone can be located along the upstream half of the hollow tubular segment. The first air inlet zone can be located along the upstream half of the support segment. The first air inlet zone can be located along the downstream half of the hollow tubular segment. The first air inlet zone can be located along the downstream half of the support segment.

[0102] Throughout this specification, when it is stated that an air inlet area is or may be located along a component of the aerosol-generating article, this means that the air inlet area is located on a portion of the packaging material covering such a component of the aerosol-generating article. For example, if the air inlet area is located along an aerosol-forming matrix strip, this means that the air inlet area is located on a portion of the packaging material covering the aerosol-forming matrix strip.

[0103] The term "upstream half" refers to the area or portion of a component between its upstream end and its midpoint. The term "downstream half" refers to the area or portion of a component between its downstream end and its midpoint.

[0104] Aerosol-generating articles may be provided with additional air inlet zones to provide additional functionality to the first air inlet zone. Aerosol-generating articles may include a second air inlet zone located on the packaging material. Such a second air inlet zone may be configured to provide ventilation for the aerosol-generating article during use within the apparatus, while the first air inlet zone serves as the article's air inlet zone. Furthermore, air inlet zones may be provided to provide further ventilation for the article during normal and compatible use.

[0105] The second air inlet zone may be located at the (second) position along the aerosol-generated article.

[0106] The second air inlet area may be located downstream of the first air inlet area on the packaging material. The second air inlet area may be positioned along the same part of the aerosol-forming article as the first air inlet area. For example, if the first air inlet area is provided along the aerosol-forming matrix strip, then the second air inlet area may be provided downstream of the first air inlet area along the aerosol-forming matrix strip.

[0107] The second air inlet zone can be located downstream of the aerosol forming matrix strip. The second air inlet zone can be located downstream of the downstream end of the aerosol forming matrix strip. The second air inlet zone can be positioned along the filter or downstream section of the aerosol-generating article. The second air inlet zone can be positioned along a hollow tubular segment. The second air inlet zone can be positioned along a support segment.

[0108] The second air inlet zone may be located at least approximately 1 mm downstream of the aerosol forming matrix strip. That is, the second air inlet zone may be located at least 1 mm downstream of the downstream end of the aerosol forming matrix strip. The second air inlet zone may be located at least approximately 2 mm downstream of the aerosol forming matrix strip. The second air inlet zone may be located at least approximately 3 mm downstream of the aerosol forming matrix strip.

[0109] The second air inlet zone may be located approximately 8 mm or less downstream of the aerosol forming matrix strip. The second air inlet zone may be located approximately 7 mm or less downstream of the aerosol forming matrix strip. The second air inlet zone may be located approximately 6 mm or less downstream of the aerosol forming matrix strip.

[0110] The second air inlet zone may be located between approximately 1 mm and approximately 8 mm downstream of the aerosol forming matrix strip. The second air inlet zone may be located between approximately 2 mm and approximately 7 mm downstream of the aerosol forming matrix strip. The second air inlet zone may be located between approximately 2 mm and approximately 6 mm downstream of the aerosol forming matrix strip. The second air inlet zone may be located between approximately 3 mm and approximately 6 mm downstream of the aerosol forming matrix strip.

[0111] The second air inlet zone may be located at least approximately 1 mm downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located at least approximately 2 mm downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located at least approximately 3 mm downstream of the upstream end of the hollow tubular segment.

[0112] The second air inlet zone may be located approximately 8 mm or less downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located approximately 7 mm or less downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located approximately 6 mm or less downstream of the upstream end of the hollow tubular segment.

[0113] The second air inlet zone may be located approximately 1 mm to 8 mm downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located approximately 2 mm to 7 mm downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located approximately 2 mm to 6 mm downstream of the upstream end of the hollow tubular segment. The second air inlet zone may be located approximately 3 mm to 6 mm downstream of the upstream end of the hollow tubular segment.

[0114] The second air inlet zone may be located at least approximately 1 mm downstream of the upstream end of the support segment. The second air inlet zone may be located at least approximately 2 mm downstream of the upstream end of the support segment. The second air inlet zone may be located at least approximately 3 mm downstream of the upstream end of the support segment.

[0115] The second air inlet area may be located approximately 8 mm or less downstream of the upstream end of the support segment. The second air inlet area may be located approximately 7 mm or less downstream of the upstream end of the support segment. The second air inlet area may be located approximately 6 mm or less downstream of the upstream end of the support segment.

[0116] The second air inlet zone may be located between approximately 1 mm and approximately 8 mm downstream of the upstream end of the support segment. The second air inlet zone may be located between approximately 2 mm and approximately 7 mm downstream of the upstream end of the support segment. The second air inlet zone may be located between approximately 2 mm and approximately 6 mm downstream of the upstream end of the support segment. The second air inlet zone may be located between approximately 3 mm and approximately 6 mm downstream of the upstream end of the support segment.

[0117] As described above, the second air inlet zone can be positioned along the aerosol forming matrix strip. The second air inlet zone can be located at least approximately 3.5 mm downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone can be located at least approximately 4 mm downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone can be located at least approximately 6.5 mm downstream of the upstream end of the aerosol forming matrix strip.

[0118] The second air inlet zone may be located approximately 20 mm or less downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone may be located approximately 16 mm or less downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone may be located approximately 12 mm or less downstream of the upstream end of the aerosol forming matrix strip.

[0119] The second air inlet zone may be located between approximately 3.5 mm and approximately 20 mm downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone may be located between approximately 4 mm and approximately 16 mm downstream of the upstream end of the aerosol forming matrix strip. The second air inlet zone may be located between approximately 6.5 mm and approximately 12 mm downstream of the upstream end of the aerosol forming matrix strip.

[0120] The second air inlet zone may be located at least approximately 1.5 mm downstream of the first air inlet zone. The second air inlet zone may be located at least approximately 2 mm downstream of the first air inlet zone. The second air inlet zone may be located at least approximately 3 mm downstream of the first air inlet zone.

[0121] The second air inlet zone may be located at least about 10 mm downstream of the first air inlet zone. Alternatively, the second air inlet zone may be located at least about 12 mm downstream of the first air inlet zone. In such embodiments, the second air inlet zone may be located downstream of the aerosol forming matrix strip.

[0122] The second air inlet zone may be located approximately 20 mm or less downstream of the first air inlet zone. The second air inlet zone may be located approximately 18 mm or less downstream of the first air inlet zone. The second air inlet zone may be located approximately 16 mm or less downstream of the first air inlet zone.

[0123] The second air inlet zone may be located between approximately 1.5 mm and approximately 20 mm downstream of the first air inlet zone. The second air inlet zone may be located between approximately 2 mm and approximately 18 mm downstream of the first air inlet zone. The second air inlet zone may be located between approximately 3 mm and approximately 16 mm downstream of the first air inlet zone.

[0124] The second air inlet zone can be located along the upstream half of the aerosol forming matrix strip. The second air inlet zone can be located along the downstream half of the aerosol forming matrix strip. The second air inlet zone can be located along the upstream half of the hollow tubular segment. The second air inlet zone can be located along the upstream half of the support segment. The second air inlet zone can be located along the downstream half of the hollow tubular segment. The second air inlet zone can be located along the downstream half of the support segment.

[0125] The air inlet zone may include one or more rows of orifices or perforations extending through the packaging material of the aerosol-generating article. The orifices or perforations in the air inlet zone may extend through a downstream section of the filter or aerosol-generating article. The orifices or perforations in the air inlet zone may extend through the peripheral wall of a hollow tubular segment of the article. The orifices or perforations in the air inlet zone may extend through the peripheral wall of a support segment of the article, particularly if the support segment is hollow.

[0126] The air inlet area may include only one row of orifices or perforations. A row of orifices or perforations may include between 8 and 30 orifices or perforations. A row of orifices or perforations may include between 10 and 20 orifices or perforations. The air inlet area may surround the aerosol-generating article. The air inlet area may define an aerosol-forming matrix strip. The air inlet area may define a hollow tubular segment. The air inlet area may define a support segment.

[0127] The perforations in the air inlet area can be of uniform size. Alternatively, the perforation size can vary. By changing the number and size of the perforations, the amount of external air entering the hollow tubular segment can be adjusted when a consumer inhales the mouthpiece of the aerosol-generating product during use. Therefore, the ventilation or air intake level of the aerosol-generating product can be advantageously adjusted. Preferably, the perforations are circular.

[0128] Air ingress perforation can be formed using any suitable technique, such as laser technology, mechanical perforation of a hollow tubular segment or support segment as part of an aerosol-generating article, or pre-perforation of the hollow tubular segment or support segment before it is combined with other components to form an aerosol-generating article. Preferably, the perforation is formed by in-line laser perforation.

[0129] Furthermore, the inventors have discovered that in the aerosol-generating articles according to the present invention, the cooling and dilution effect caused by the entry of ventilation air at the location of the duct defined by the aforementioned hollow tubular segment has a surprisingly reducing effect on the generation and delivery of phenolic substances.

[0130] The air inlet zone may include one or more rows of perforations formed through the peripheral wall of the hollow tubular segment. As described above, the second air inlet zone may be a ventilation zone. Preferably, the ventilation zone includes only one row of perforations. This is considered advantageous because aerosol nucleation can be further enhanced by condensing the cooling effect produced by ventilation on a short portion of the cavity defined by the hollow tubular segment. This is because the expected faster and more intense cooling of the volatile material flow is particularly favorable for the formation of new aerosol particle nuclei.

[0131] Preferably, one or more rows of perforations are arranged circumferentially around the wall of the hollow tube. In the case where the ventilation zone includes two or more rows of perforations formed through the circumferential wall of the hollow tubular segment, the rows are longitudinally spaced apart from each other along the hollow tubular segment.

[0132] The radius of the air entering the perforation or opening may be at least about 0.05 mm. The radius of the air entering the perforation or opening may be at least about 0.06 mm. The radius of the air entering the perforation or opening may be at least about 0.1 mm. The radius of the air entering the perforation may be between about 0.06 mm and about 0.1 mm.

[0133] The equivalent diameter of at least one of the ventilation or air inlet perforations is preferably at least about 100 micrometers. Preferably, the equivalent diameter of at least one of the ventilation perforations is at least about 150 micrometers. Even more preferably, the equivalent diameter of at least one of the ventilation perforations is at least about 200 micrometers. Alternatively, the equivalent diameter of at least one of the ventilation perforations is preferably less than about 500 micrometers. More preferably, the equivalent diameter of at least one of the ventilation perforations is less than about 450 micrometers. Even more preferably, the equivalent diameter of at least one of the ventilation perforations is less than about 400 micrometers. The term "equivalent diameter" is used herein to refer to the diameter of a circle having the same surface area as the cross-section of the ventilation perforation. The cross-section of the ventilation perforation can have any suitable shape. However, circular ventilation perforations are preferred.

[0134] The ventilation or air inlet perforations can be of uniform size. Alternatively, the size of the ventilation perforations can vary. By changing the number and size of the ventilation perforations, the amount of external air entering the hollow tubular segment can be adjusted when a consumer inhales the mouthpiece of the aerosol-generating product during use. Therefore, the ventilation level of the aerosol-generating product can be advantageously adjusted.

[0135] The air inlet area may include a basic porous portion of the packaging material of the aerosol-generating article. Such a porous portion may be defined within an airtight or impermeable packaging material of the aerosol-generating article, or may be defined by a different material forming part of the packaging material of the aerosol-generating article. Such a porous portion may be defined by a porous pattern defined in the packaging material. Such a porous portion may define a first air inlet area or a second air inlet area. Therefore, the first air inlet area or the second air inlet area may have the porous characteristics of such a porous portion.

[0136] Compared to the rest of the packaging material for aerosol-generating articles, such porous portions of the packaging material can have relatively high porosity. The porosity of such porous portions can be at least about 3000 Coresta units (CU). The porosity of such porous portions can be at least about 5000 Coresta units (CU). The porosity of such porous portions can be less than about 25000 Coresta units (CU). The porosity of such porous portions can be less than about 20000 Coresta units (CU). The porosity of such porous portions can be between about 3000 CU and about 25000 CU. The porosity of such porous portions can be between about 5000 CU and about 20000 CU.

[0137] The width of the air inlet zone (first air inlet zone, second air inlet zone, or any air inlet zone) may be at least about 1 mm. The width of the air inlet zone may be at least about 3 mm. The width of the air inlet zone may be at least about 5 mm. The “width” of the air inlet zone refers to its size in the axial or longitudinal direction of the aerosol-generating article. Therefore, the “width” of the air inlet zone may be referred to as the “length” of the air inlet zone.

[0138] The width of the first air inlet zone can be greater than the width of the second air inlet zone. This allows the first air inlet zone to be used as the main air inlet for the aerosol-generated article when received in a compatible aerosol generating apparatus, while the second or subsequent air inlet zones can be used as secondary air inlet zones or ventilation zones.

[0139] Such relatively wide air inlet zones can be formed by porous portions of packaging material with relatively high porosity (as described above), multiple perforation lines, or a single relatively wide perforation line.

[0140] By providing a wide air inlet area, such as a first air inlet area, more of the surface area of ​​the first air inlet area will overlap or align with the outlet of the airflow channel of the aerosol generating device. Therefore, this will reliably ensure fluid communication between the outside of the aerosol generating device and the inside of the aerosol-generated article received within the device, allowing the consumer to properly consume the article. Having a relatively wide air inlet area can account for any manufacturing inaccuracies in the air inlet area, which could affect the alignment of the outlet of the airflow channel of the device with the air inlet area.

[0141] The air inlet zone may completely or partially surround the aerosol-generating article. The air inlet zone may be located around the aerosol-generating article.

[0142] The aerosol generating article may include a first air inlet region and a second air inlet region positioned along an aerosol forming matrix strip. The aerosol generating article may include a first air inlet region positioned along an aerosol forming matrix strip and a second air inlet region located downstream of the aerosol forming matrix strip. The aerosol generating article may include a first air inlet region positioned along an aerosol forming matrix strip and a second air inlet region positioned along a hollow tubular segment. The aerosol generating article may include a first air inlet region positioned along an aerosol forming matrix strip and a second air inlet region positioned along a support segment.

[0143] Each air inlet zone provides or allows a certain level of air inflow into the interior of the aerosol-generating article. The air inflow level can refer to the amount of fluid allowed to enter the interior of the aerosol-generating article through the air inlet zone. The air inflow level can be expressed as air volume, measured in cubic millimeters, which can enter through the air inlet zone over a period of time, measured in seconds. The air inflow level can also be expressed as mass flow rate, measured in grams or kilograms per second, or volumetric flow rate, measured in milliliters or liters per second.

[0144] The air inlet level entering the interior of the aerosol-generating article through the first air inlet zone can be configured to be greater than the air inlet level entering the interior of the aerosol-generating article through the second air inlet zone. This is to ensure that, during use, when the aerosol-generating article is received in the aerosol-generating device, an appropriate amount of air flows through the first air inlet zone to serve as the main air inlet zone for the article, while the second air inlet zone provides ventilation for the article.

[0145] The air inflow level through the air inflow zone can be defined as the volumetric flow rate. The air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the first air inflow zone can be at least approximately 10% higher than the air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the second air inflow zone. The air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the first air inflow zone can be at least approximately 20% higher than the air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the second air inflow zone. The air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the first air inflow zone can be at least approximately 30% higher than the air inflow level (volumetric flow rate) into the interior of the aerosol-generating article through the second air inflow zone.

[0146] The air inflow level (volume flow rate) into the aerosol-generating article through the first air inflow zone can be less than about 300% higher than the air inflow level (volume flow rate) into the aerosol-generating article through the second air inflow zone. The air inflow level (volume flow rate) into the aerosol-generating article through the first air inflow zone can be less than about 200% higher than the air inflow level (volume flow rate) into the aerosol-generating article through the second air inflow zone. The air inflow level (volume flow rate) into the aerosol-generating article through the first air inflow zone can be less than about 100% higher than the air inflow level (volume flow rate) into the aerosol-generating article through the second air inflow zone. The air inflow level (volume flow rate) into the aerosol-generating article through the first air inflow zone can be less than about 90% higher than the air inflow level (volume flow rate) into the aerosol-generating article through the second air inflow zone. The air inflow level, i.e., volumetric flow rate, into the aerosol-generating article through the first air inflow zone can be less than about 75% higher than the air inflow level (volumetric flow rate) into the aerosol-generating article through the second air inflow zone. The air inflow level, i.e., volumetric flow rate, into the aerosol-generating article through the first air inflow zone can be less than about 60% higher than the air inflow level (volumetric flow rate) into the aerosol-generating article through the second air inflow zone.

[0147] Over a period of time, a certain volume of air enters the aerosol generating device through one or more airflow channels. A first proportion of this volume of air enters the interior of the aerosol generating article through a first air inlet area, and a second proportion of this volume of air enters the interior of the aerosol generating article through a second air inlet area. For example, during time period T, a volume V of air enters the aerosol generating device, and a first proportion of V, expressed as a percentage of V, enters the interior of the aerosol generating article through the first air inlet area, while a second proportion of V enters the interior of the aerosol generating article through the second air inlet area.

[0148] Relative to the total volume of air entering the aerosol generating apparatus over a period of time, at least approximately 50% of that total volume enters the interior of the aerosol generating article through the first air inlet zone. Relative to the total volume of air entering the aerosol generating apparatus over a period of time, at least approximately 55% of that total volume enters the interior of the aerosol generating article through the first air inlet zone. Relative to the total volume of air entering the aerosol generating apparatus over a period of time, at least approximately 60% of that total volume enters the interior of the aerosol generating article through the first air inlet zone. Relative to the total volume of air entering the aerosol generating apparatus over a period of time, at least approximately 70% of that total volume enters the interior of the aerosol generating article through the first air inlet zone. Relative to the total volume of air entering the aerosol generating apparatus over a period of time, at least approximately 75% of that total volume enters the interior of the aerosol generating article through the first air inlet zone.

[0149] Approximately 50% or less of the total volume of air entering the aerosol generating apparatus over a period of time may enter the interior of the aerosol generating article through the second air inlet zone. Approximately 45% or less of the total volume of air entering the aerosol generating apparatus over a period of time may enter the interior of the aerosol generating article through the second air inlet zone. Approximately 40% or less of the total volume of air entering the aerosol generating apparatus over a period of time may enter the interior of the aerosol generating article through the second air inlet zone. Approximately 30% or less of the total volume of air entering the aerosol generating apparatus over a period of time may enter the interior of the aerosol generating article through the second air inlet zone. Approximately 25% or less of the total volume of air entering the aerosol generating apparatus over a period of time may enter the interior of the aerosol generating article through the second air inlet zone.

[0150] Approximately 50% of the total air volume entering the aerosol generating device over a period of time can enter the interior of the aerosol generating article through the first air inlet zone, and approximately 50% of the total air volume can enter the interior of the aerosol generating article through the second air inlet zone.

[0151] Relative to the total volume of air entering the aerosol generating device over a period of time, approximately 55% of the total volume can enter the interior of the aerosol generating article through the first air inlet zone, and 45% of the total volume can enter the interior of the aerosol generating article through the second air inlet zone.

[0152] Relative to the total volume of air entering the aerosol generating device over a period of time, approximately 60% of the total volume can enter the interior of the aerosol generating article through the first air inlet zone, and approximately 40% of the total volume can enter the interior of the aerosol generating article through the second air inlet zone.

[0153] Relative to the total volume of air entering the aerosol generating device over a period of time, approximately 70% of the total volume can enter the interior of the aerosol generating article through the first air inlet zone, and approximately 30% of the total volume can enter the interior of the aerosol generating article through the second air inlet zone.

[0154] Relative to the total volume of air entering the aerosol generating device over a period of time, approximately 75% of the total volume can enter the interior of the aerosol generating article through the first air inlet zone, and approximately 25% of the total volume can enter the interior of the aerosol generating article through the second air inlet zone.

[0155] Similarly, before air leaves the airflow channel and heads towards the aerosol generating device, a certain volumetric flow rate can flow through the airflow channel or multiple airflow channels of the aerosol generating device. Based on this inlet volumetric flow rate (or the airflow channel volumetric flow rate existing in the airflow channel before the outlet), a first proportion of this inlet volumetric flow rate can flow through a first air inlet zone, and a second proportion of this inlet volumetric flow rate can flow through a second air inlet zone. For example, a volumetric flow rate VF can flow through the airflow channel, then a first proportion of VF, expressed as a percentage of VF, can flow through the first air inlet zone, and a second proportion of VF can flow through the second air inlet zone.

[0156] At least approximately 50% of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device can flow through the first air inlet zone. At least approximately 55% of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device can flow through the first air inlet zone. At least approximately 60% of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device can flow through the first air inlet zone. At least approximately 70% of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device can flow through the first air inlet zone. At least approximately 75% of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device can flow through the first air inlet zone.

[0157] Approximately 50% or less of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device flows through the second air inlet zone. Approximately 45% or less of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device flows through the second air inlet zone. Approximately 40% or less of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device flows through the second air inlet zone. Approximately 30% or less of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device flows through the second air inlet zone. Approximately 25% or less of the inlet volumetric flow rate relative to the inlet flow path of the aerosol generating device flows through the second air inlet zone.

[0158] Approximately 50% of the inlet volume flow rate, relative to the airflow channel of the aerosol generating device, can flow through the first air inlet zone, and approximately 50% of the inlet volume flow rate can flow through the second air inlet zone.

[0159] Approximately 55% of the inlet volumetric flow rate relative to the airflow channel of the aerosol generating device can flow through the first air inlet zone, and approximately 45% of the inlet volumetric flow rate can flow through the second air inlet zone.

[0160] Approximately 60% of the inlet volume flow rate relative to the airflow channel of the aerosol generating device can flow through the first air inlet zone, and approximately 40% of the inlet volume flow rate can flow through the second air inlet zone.

[0161] Approximately 70% of the inlet volume flow rate relative to the airflow channel of the aerosol generating device can flow through the first air inlet zone, and approximately 30% of the inlet volume flow rate can flow through the second air inlet zone.

[0162] Approximately 75% of the inlet volumetric flow rate relative to the airflow channel of the aerosol generating device can flow through the first air inlet zone, and approximately 25% of the inlet volumetric flow rate can flow through the second air inlet zone.

[0163] Throughout this specification, the term "ventilation level" can be used to refer to the volume ratio between the airflow entering the aerosol generating article via the air inlet area (air inlet airflow) and the airflow exiting the aerosol generating article via the inlet or downstream end. A higher ventilation level results in a higher dilution of the aerosol stream delivered to the consumer. The ventilation level is measured independently on the aerosol generating article, i.e., without inserting the aerosol generating article into a suitable aerosol generating device adapted to heat the aerosol forming matrix.

[0164] The ventilation level provided by the first air inlet zone can be measured by blocking all other air inlets (if any) and drawing air in from the orifice of the aerosol generating article so that air can flow through the front or upstream end of the aerosol generating article and into the aerosol generating article via the first air inlet zone. The ventilation level provided by the first air inlet zone can be defined as the ratio between the flow rate of air (airflow) entering the aerosol generating article through the first air inlet zone and the flow rate of air leaving the aerosol generating article at the orifice.

[0165] The ventilation level provided by the second air inlet zone can be measured by blocking all other air inlets (if any) and drawing air in from the opening of the aerosol generating article so that air can flow through the front or upstream end of the aerosol generating article and into the aerosol generating article via the second air inlet zone. The ventilation level provided by the second air inlet zone can be defined as the ratio between the flow rate of air (airflow) entering the aerosol generating article through the second air inlet zone and the flow rate of air leaving the aerosol generating article at the opening.

[0166] The overall ventilation level of an aerosol generating article can be measured by drawing air in from the inlet of the aerosol generating article without obstructing any air inlet areas present in the aerosol generating article, allowing air to flow through the front or upstream end of the aerosol generating article and into the air inlet areas. The overall ventilation level of the aerosol generating article can be defined as the ratio of the sum of the airflow rates entering the aerosol generating article through each air inlet area to the airflow rate leaving the aerosol generating article at the inlet.

[0167] The ventilation level provided by the first air inlet zone to the aerosol-generating article can be at least about 10%. The ventilation level provided by the first air inlet zone can be at least about 20%. The ventilation level provided by the first air inlet zone can be at least about 25%. The ventilation level provided by the first air inlet zone can be at least about 50%. The ventilation level provided by the first air inlet zone can be at least about 75%.

[0168] The ventilation level provided by the second air inlet zone to the aerosol-generating article can be at least about 10%. The ventilation level provided by the second air inlet zone can be at least about 20%. The ventilation level provided by the second air inlet zone can be at least about 25%. The ventilation level provided by the second air inlet zone can be at least about 50%. The ventilation level provided by the second air inlet zone can be at least about 75%.

[0169] The ventilation level provided by the first or second air inlet zone may be approximately 75% or less. The ventilation level provided by the first or second air inlet zone may be approximately 60% or less. The ventilation level provided by the first or second air inlet zone may be approximately 50% or less.

[0170] The ventilation level provided by the first air inlet zone or the second air inlet zone may be between approximately 10% and approximately 75%. The ventilation level provided by the first air inlet zone or the second air inlet zone may be between approximately 30% and approximately 60%.

[0171] Aerosol-generating articles typically have a total ventilation level of at least about 10%, preferably at least about 20%.

[0172] Aerosol-generating products may have a total ventilation level of at least about 20%, about 25%, or about 30%. Aerosol-generating products may have a total ventilation level of at least about 35%. Aerosol-generating products may have a total ventilation level of less than about 60%. Aerosol-generating products may have a total ventilation level of less than about 50% or less than about 40%. Aerosol-generating products may have a total ventilation level between about 25% and about 60%.

[0173] Aerosol-generating products can have a total ventilation level of about 10% to about 90%. Aerosol-generating products can have a total ventilation level of about 20% to about 80%. Aerosol-generating products can have a total ventilation level of about 25% to about 60%. Aerosol-generating products can have a total ventilation level of about 30% to about 50%. Aerosol-generating products can have a total ventilation level of about 30% to about 40%.

[0174] Aerosol-generating articles can have a total ventilation level of about 28% to about 42%. Aerosol-generating articles can have a ventilation level of about 35%. The inventors have surprisingly discovered that when the ventilation level is between about 30% and about 50%, the dilution effect on the aerosol—particularly which can be assessed by measuring the delivery effect on glycerol contained in the aerosol-forming matrix as an aerosol forming agent—is advantageously minimized. In particular, it has been found that ventilation levels between about 35% and about 42% produce particularly satisfactory glycerol delivery values. At the same time, the degree of nucleation and therefore the delivery of nicotine and the aerosol forming agent (e.g., glycerol) are enhanced.

[0175] The first air inlet zone can be used as a first or main air inlet zone, while the second air inlet zone can be used as a ventilation zone for the aerosol-generating article. This is because when the aerosol-generating article is located within the device cavity, the first air inlet zone will be configured as the first point of air entry, and compared to any other air inlet zone located on the packaging material of the article, the first air inlet zone can be configured to receive the highest level of air.

[0176] As described above, the first air inlet zone ensures compatibility between the aerosol-generating article and the aerosol-generating apparatus by defining the main air inlet area of ​​the article, while the second air inlet zone provides ventilation for the aerosol-generating article during normal use while it is received within the apparatus. During normal use, all air inlets may be located within the apparatus cavity or heating chamber of the aerosol-generating apparatus. This prevents the user from unintentionally blocking any air inlet zone with their hand or lips during normal use, which could negatively impact the user experience as the article may not be ventilated.

[0177] Providing ventilation for aerosol-generating products during normal use is beneficial. Without being bound by theory, it has been found that the temperature drop caused by the cooler and outside air entering the hollow tubular segment through the ventilation zone can have a favorable effect on the nucleation and growth of aerosol particles.

[0178] In situations that can be further complicated by coalescence, the temperature and rate of cooling play a crucial role in determining how the system responds. Generally, different cooling rates can lead to significantly different temporal behaviors associated with liquid phase (droplet) formation, since nucleation processes are typically nonlinear. Without being bound by theory, it is assumed that cooling leads to a rapid increase in droplet number concentration, followed by a strong, brief surge in this growth (nucleation burst). This nucleation burst appears to be more pronounced at lower temperatures. Furthermore, higher cooling rates seem to favor earlier initiation of nucleation. In contrast, decreasing cooling rates appear to have a favorable effect on the final size eventually reached by aerosol droplets.

[0179] Therefore, the rapid cooling caused by outside air entering the hollow tubular segment through the ventilation zone can be advantageously used to promote the nucleation and growth of aerosol droplets. However, at the same time, the entry of outside air into the hollow tubular segment has the direct disadvantage of diluting the aerosol stream delivered to the consumer.

[0180] Furthermore, it has been found that in the aerosol-generating articles according to the present invention, the cooling and dilution effect caused by the entry of ventilation air at the location of the duct defined by the aforementioned hollow tubular segment has a surprisingly reducing effect on the generation and delivery of phenolic substances.

[0181] This is understood to be advantageous because aerosol nucleation can be further enhanced by concentrating the cooling effect produced by ventilation on a short portion of the cavity defined by the hollow tubular segments. This is because the faster and more intense cooling expected from the flow of volatiles from the aerosol-forming matrix is ​​particularly favorable for the formation of new nuclei for aerosol particles.

[0182] The aerosol forming matrix strip preferably has an outer diameter approximately equal to that of the aerosol-generated article.

[0183] Preferably, the aerosol forming matrix strip has an outer diameter of at least about 4 millimeters (mm). The aerosol forming matrix strip may have an outer diameter of at least about 5 millimeters. The outer diameter of the aerosol forming matrix strip may be between about 5 millimeters and about 12 millimeters, for example, between about 5 millimeters and about 10 millimeters, or between about 6 millimeters and about 8 millimeters. In a preferred embodiment, the aerosol forming matrix strip has an outer diameter of 7.2 millimeters to within 10%.

[0184] The length of the aerosol forming matrix strip can be between about 5 mm and about 100 mm. Preferably, the aerosol forming matrix strip has a length of at least about 5 mm, more preferably at least about 7 mm. Alternatively, the aerosol forming matrix strip preferably has a length of less than about 80 mm, more preferably less than about 65 mm, and even more preferably less than about 50 mm. In a particularly preferred embodiment, the aerosol forming matrix strip has a length of less than about 35 mm, more preferably less than 25 mm, and even more preferably less than about 20 mm. In one embodiment, the aerosol forming matrix strip may have a length of about 10 mm. In a preferred embodiment, the aerosol forming matrix strip has a length of about 12 mm.

[0185] Preferably, the aerosol forming matrix strip has a substantially uniform cross-section along its length. Particularly preferably, the aerosol forming matrix strip has a substantially circular cross-section.

[0186] In a preferred embodiment, the aerosol forming matrix comprises an aggregated sheet of one or more homogenized tobacco materials. The one or more sheets of homogenized tobacco material may be textured. As used herein, the term "textured sheet" refers to a sheet that has been curled, embossed, debossed, perforated, or otherwise deformed. The textured sheet of homogenized tobacco material used in this invention may include a plurality of spaced-apart indentations, protrusions, perforations, or combinations thereof. The aerosol forming matrix strip may comprise an aggregated, curled sheet of homogenized tobacco material defined by packaging material.

[0187] In some preferred embodiments, the aerosol forming matrix comprises homogeneous plant material, preferably homogeneous tobacco material.

[0188] As used herein, the term "homogenized plant material" encompasses any plant material formed by the agglomeration of plant particles. For example, sheets or webs of homogenized tobacco material used as the aerosol-forming matrix of the present invention can be formed by agglomerating particles of tobacco material obtained by crushing, grinding, or grinding plant material, and optionally one or more of tobacco leaves and tobacco stems. Homogenized plant materials can be produced by casting, extrusion, papermaking processes, or any other suitable processes known in the art.

[0189] Homogenized plant material can be provided in any suitable form. For example, homogenized plant material can be in the form of one or more sheets. As used herein with reference to the invention, the term "sheet" describes a layered element whose width and length are substantially greater than its thickness.

[0190] Alternatively, or otherwise, homogenized plant material may be in the form of multiple pellets or granules.

[0191] Alternatively or additionally, homogenized plant material may be in the form of multiple strips, bands, or fragments. As used herein, the term "strip" describes an elongated element of material whose length is substantially greater than its width and thickness. The term "strip" should be considered to include bands, fragments, and any other homogenized plant material of similar form. Bundles of homogenized plant material may be formed from sheets of homogenized plant material, for example by cutting or shredding, or by other methods, such as extrusion.

[0192] As used herein, the term "curled sheet" is intended to be synonymous with the term "wrinkled sheet" and refers to a sheet having a plurality of substantially parallel ridges or corrugations. Preferably, the curled sheet of homogeneous tobacco material has a plurality of ridges or corrugations substantially parallel to the cylindrical axis of the strip according to the invention. This advantageously promotes the aggregation of the curled sheet of homogeneous tobacco material to form a strip. However, it should be understood that the curled sheet of homogeneous tobacco material used in the invention may alternatively or additionally have a plurality of substantially parallel ridges or corrugations disposed at acute or obtuse angles to the cylindrical axis of the strip. The sheet of homogeneous tobacco material for the strip of the article of the invention can be textured substantially uniformly over its substantially entire surface. For example, the curled sheet of homogeneous tobacco material used to manufacture the strip of the aerosol-generating article according to the invention may comprise a plurality of substantially parallel ridges or corrugations spaced substantially uniformly across the width of the sheet.

[0193] The sheet or web of the homogeneous tobacco material used in this invention may have a tobacco content of at least about 40% by weight on a dry weight basis, more preferably at least about 60% by weight on a dry weight basis, more preferably at least about 70% by weight on a dry weight basis, and most preferably at least about 90% by weight on a dry weight basis.

[0194] Sheets or webs of homogeneous tobacco material used in an aerosol-forming matrix may include one or more intrinsic binders, i.e., tobacco intrinsic binders, one or more extrinsic binders, i.e. tobacco extrinsic binders, or combinations thereof, to facilitate the aggregation of particulate tobacco. Alternatively or additionally, sheets of homogeneous tobacco material used in an aerosol-forming matrix may include other additives, including but not limited to tobacco and non-tobacco fibers, aerosol forming agents, humectants, plasticizers, flavorings, fillers, aqueous solvents and non-aqueous solvents, and combinations thereof.

[0195] Homogeneous plant or tobacco materials include tobacco pellets or materials, as well as non-tobacco plant flavoring pellets. Non-tobacco plant flavoring pellets may be selected from one or more of the following: ginger pellets, rosemary pellets, eucalyptus pellets, clove pellets, and star anise pellets.

[0196] Suitable external binders, including those for sheets or webs of homogeneous tobacco material used in aerosol-forming matrices, are known in the art and include, but are not limited to: gums, such as guar gum, xanthan gum, gum arabic, and locust bean gum; cellulose binders, such as hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, and ethyl cellulose; polysaccharides, such as starch; organic acids, such as alginic acid; conjugate base salts of organic acids, such as sodium alginate, agar, and pectin; and combinations thereof.

[0197] Suitable non-tobacco fibers included in sheets or webs of homogeneous tobacco material for aerosol forming matrix are known in the art and include, but are not limited to: cellulose fibers; softwood fibers; hardwood fibers; jute fibers and combinations thereof. Prior to being included in sheets of homogeneous tobacco material for aerosol forming matrix, the non-tobacco fibers may be processed by suitable methods known in the art, including but not limited to: mechanical pulping; refining; chemical pulping; bleaching; sulfate pulping; and combinations thereof.

[0198] In other embodiments of the invention, the aerosol-forming matrix may include a gel composition comprising an alkaloid compound. The aerosol-forming matrix may include a nicotine-containing gel composition. The aerosol-forming matrix may also include a nicotine-free gel composition.

[0199] Preferably, the gel composition comprises an alkaloid compound; an aerosol forming agent; and at least one gelling agent. Preferably, at least one gelling agent forms a solid medium, and glycerol is dispersed in the solid medium, wherein the alkaloid is dispersed in the glycerol. Preferably, the gel composition is a stable gel phase.

[0200] Advantageously, nicotine-containing stable gel compositions provide a predictable compositional form during storage or shipment from manufacturer to consumer. Nicotine-containing stable gel compositions substantially retain their shape. Nicotine-containing stable gel compositions substantially do not release the liquid phase during storage or shipment from manufacturer to consumer. Nicotine-containing stable gel compositions allow for simple consumable design. The consumable does not need to be designed to contain liquid, thus allowing for a wider range of material and container constructions to be considered.

[0201] The gel composition described herein can be combined with an aerosol generating device to deliver nicotine aerosol to the lungs at an inhalation rate or airflow rate within the range of conventional smoking inhalation rates or airflow rates. The aerosol generating device can continuously heat the gel composition. The consumer can take multiple inhalations or "puffs," with each "puff" delivering a certain amount of nicotine aerosol. When preferably heated in a continuous manner, the gel composition is capable of delivering a high nicotine / low total particulate matter (TPM) aerosol to the consumer.

[0202] The phrase "stable gel phase" or "stable gel" refers to a gel that substantially retains its shape and quality when exposed to a variety of environmental conditions. When exposed to standard temperature and pressure while the relative humidity changes from about 10% to about 60%, a stable gel will substantially not release (sweat) or absorb moisture. For example, when exposed to standard temperature and pressure while the relative humidity changes from about 10% to about 60%, a stable gel can substantially maintain its shape and quality.

[0203] The gel composition includes an alkaloid compound. The gel composition may include one or more alkaloids.

[0204] The term "alkaloid compound" refers to any of a class of naturally occurring organic compounds containing one or more basic nitrogen atoms. Typically, alkaloids contain at least one nitrogen atom in an amine-type structure. This or other nitrogen atom in the alkaloid compound molecule can function as a base in acid-base reactions. In most alkaloid compounds, one or more of the nitrogen atoms are part of a cyclic system, such as a heterocycle. In nature, alkaloid compounds are primarily found in plants, particularly in certain flowering plant families. However, some alkaloid compounds are found in animal species and fungi. In this disclosure, the term "alkaloid compound" refers to alkaloid compounds of natural origin and synthetically produced alkaloid compounds.

[0205] The gel composition may preferably include an alkaloid compound selected from nicotine, anaphylabine, and combinations thereof.

[0206] Preferably, the gel composition includes nicotine.

[0207] The term "nicotine" refers to nicotine and nicotine derivatives, such as free nicotine base and nicotine salts.

[0208] The gel composition preferably includes an aerosol forming agent. Ideally, the aerosol forming agent is substantially resistant to thermal degradation at the operating temperature of the associated aerosol generating device. Suitable aerosol forming agents include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono, di, or triacetic acid esters of glycerol; and aliphatic esters of mono, di, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. The polyol or mixture thereof may be one or more of triethylene glycol, 1,3-butanediol, glycerol (glycerol or propane-1,2,3-triol), or polyethylene glycol. The aerosol forming agent is preferably glycerol.

[0209] Preferably, in embodiments where the aerosol forming matrix strip comprises a gel composition, as described above, the downstream section of the aerosol generating article includes an aerosol cooling element with a length of less than about 10 mm. It has been found that combining a relatively short aerosol cooling element with the gel composition optimizes aerosol delivery to consumers.

[0210] In embodiments of the invention, the aerosol forming matrix strip comprises the gel composition as described above, preferably including an upstream element (or upstream segment) upstream of the aerosol forming matrix strip. In this case, the upstream element or segment advantageously prevents physical contact with the gel composition. The upstream element or segment can also advantageously compensate for any potential reduction in RTD, for example due to evaporation of the gel composition when the aerosol forming matrix strip is heated during use.

[0211] The sheet or web of homogeneous tobacco material may include an aerosol forming agent. As used herein, the term "aerosol forming agent" describes any suitable known compound or mixture of compounds that promotes aerosol formation in use and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.

[0212] Suitable aerosol forming agents are known in the art and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and fatty acid esters of monocarboxylic acids, dicarboxylic acids, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate.

[0213] Preferred aerosol forming agents are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol.

[0214] Homogenized tobacco material sheets or webs may contain a single aerosol forming agent. Alternatively, homogenized tobacco material sheets or webs may contain a combination of two or more aerosol forming agents.

[0215] The homogenized tobacco material sheets or webs have an aerosol forming agent content of greater than 10% by dry weight. Preferably, the homogenized tobacco material sheets or webs have an aerosol forming agent content of greater than 12% by dry weight. More preferably, the homogenized tobacco material sheets or webs have an aerosol forming agent content of greater than 14% by dry weight. Even more preferably, the homogenized tobacco material sheets or webs have an aerosol forming agent content of greater than 16% by dry weight.

[0216] Homogenized tobacco sheet may have an aerosol forming agent content of about 10% to about 30% by dry weight. Preferably, the homogenized tobacco sheet or web has an aerosol forming agent content of less than 25% by dry weight.

[0217] In a preferred embodiment, the sheet of homogeneous tobacco material has an aerosol forming agent content of about 20% by dry weight.

[0218] The sheets or webs of homogeneous tobacco used in the aerosol-generating articles of the present invention can be manufactured by methods known in the art (e.g., the method disclosed in International Patent Application WO-A-2012 / 164009A2). In a preferred embodiment, the sheets of homogeneous tobacco material used in the aerosol-generating articles are formed by a casting process from a slurry comprising particulate tobacco, guar gum, cellulose fibers, and glycerol.

[0219] Alternative arrangements of homogeneous tobacco material in strips used in aerosol-generating articles will be known to those skilled in the art and may include stacked sheets of multiple homogeneous tobacco materials, multiple elongated tubular elements formed by winding homogeneous tobacco material strips around their longitudinal axis, and so on.

[0220] As an alternative, the aerosol forming matrix strip may include a non-tobacco-based, nicotine-containing material, such as a sheet of non-tobacco material loaded with nicotine (e.g., in the form of nicotine salts) and an aerosol forming agent. Examples of such strips are described in International Application WO-A-2015 / 082652. Alternatively, the aerosol forming matrix strip may also include non-tobacco plant materials, such as aromatic non-tobacco plant materials.

[0221] The aerosol forming matrix is ​​surrounded by packaging material. The packaging material can be formed from porous or non-porous sheet material. The packaging material can be formed from any suitable material or combination of materials. Preferably, the packaging material is paper packaging material.

[0222] The mouthpiece segment includes a filter material segment capable of removing particulate components, gaseous components, or combinations thereof. Suitable filter materials are known in the art and include, but are not limited to: fibrous filter materials, such as cellulose acetate tow, viscose fibers, polyhydroxyalkanoate (PHA) fibers, polylactic acid (PLA) fibers, and paper; adsorbents, such as activated alumina, zeolite, molecular sieves, and silica gel; and combinations thereof. Additionally, the filter material segment may also include one or more aerosol modifiers. Suitable aerosol modifiers are known in the art and include, but are not limited to, flavorings, such as, for example, menthol. In some embodiments, the mouthpiece segment may also include a mouth-end recess downstream of the filter material segment. For example, the mouthpiece segment may include a hollow tube longitudinally aligned with and disposed immediately downstream of the filter material segment, the hollow tube forming a cavity at its mouth-end that is open to the external environment at the downstream end of the mouthpiece segment and the aerosol-generating article.

[0223] The length of the mouthpiece segment is preferably at least about 4 mm, more preferably at least about 6 mm, and even more preferably at least about 8 mm. Alternatively, the length of the mouthpiece segment is preferably less than 25 mm, more preferably less than 20 mm, and even more preferably less than 15 mm. In some preferred embodiments, the length of the mouthpiece segment is from about 4 mm to about 25 mm, more preferably from about 6 mm to about 20 mm. The length of the mouthpiece segment can be about 7 mm. The length of the mouthpiece segment can be about 12 mm.

[0224] The length of the hollow tubular segment is preferably at least about 10 mm. More preferably, the length of the hollow tubular segment is at least about 15 mm. Alternatively, the length of the hollow tubular segment is preferably less than about 30 mm. More preferably, the length of the hollow tubular segment is less than about 25 mm. Even more preferably, the length of the hollow tubular segment is less than about 20 mm. In some preferred embodiments, the length of the hollow tubular segment is about 10 mm to about 30 mm, more preferably about 12 mm to about 25 mm, and even more preferably about 15 mm to about 20 mm. For example, in a particularly preferred embodiment, the length of the hollow tubular segment is about 18 mm. In another particularly preferred embodiment, the length of the hollow tubular segment is about 13 mm.

[0225] The length of the aerosol cooling element is preferably at least about 10 mm. More preferably, the length of the aerosol cooling element is at least about 15 mm. Alternatively, the length of the aerosol cooling element is preferably less than about 30 mm. More preferably, the length of the aerosol cooling element is less than about 25 mm. Even more preferably, the length of the aerosol cooling element is less than about 20 mm. In some preferred embodiments, the length of the aerosol cooling element is about 10 mm to about 30 mm, more preferably about 12 mm to about 25 mm, and even more preferably about 15 mm to about 20 mm. For example, in a particularly preferred embodiment, the length of the aerosol cooling element is about 18 mm. In another particularly preferred embodiment, the length of the aerosol cooling element is about 13 mm.

[0226] The total length of the aerosol-generating article according to the present invention is preferably at least about 40 mm. Alternatively, the total length of the aerosol-generating article according to the present invention is preferably less than about 70 mm, more preferably less than 60 mm, and even more preferably less than 50 mm. In a preferred embodiment, the total length of the aerosol-generating article is between about 40 mm and about 70 mm. In an exemplary embodiment, the total length of the aerosol-generating article is about 45 mm.

[0227] The support element (or support segment) may have a length between about 5 mm and about 15 mm. In a preferred embodiment, the support element has a length of about 8 mm.

[0228] The aerosol-generating article preferably has an overall RTD of less than about 90 mmH2O (about 900 Pa). More preferably, the aerosol-generating article has an overall RTD of less than about 80 mmH2O (about 800 Pa). Even more preferably, the aerosol-generating article has an overall RTD of less than about 70 mmH2O (about 700 Pa).

[0229] Alternatively, the aerosol-generating article preferably has a total RTD of at least about 30 mmH2O (about 300 Pa). More preferably, the aerosol-generating article has a total RTD of at least about 40 mmH2O (about 400 Pa). Even more preferably, the aerosol-generating article has a total RTD of at least about 50 mmH2O (about 500 Pa).

[0230] The RTD of an aerosol-generating article can be evaluated as the negative pressure that must be applied to the downstream end of the mouthpiece under the test conditions defined in ISO 3402 to maintain a stable volumetric airflow of 17.5 ml / s through the mouthpiece. The RTD values ​​listed above are intended to be measured individually on the aerosol-generating article (i.e., before the article is inserted into the aerosol-generating device) without obstructing the perforations in the ventilation area.

[0231] As used in this specification, the term "homogeneous tobacco material" encompasses any tobacco material formed by the agglomeration of tobacco material particles. Homogeneous tobacco material sheets or webs are formed by agglomerating particulate tobacco, which is obtained by grinding or otherwise pulverizing one or both of tobacco leaves and tobacco stems. Additionally, homogeneous tobacco material may include small amounts of one or more of tobacco dust, tobacco particles, and other particulate tobacco byproducts formed during tobacco processing, handling, and transportation. Homogeneous tobacco material sheets can be produced by casting, extrusion, papermaking processes, or any other suitable process known in the art.

[0232] The support element can be formed from any suitable material or combination of materials. For example, the support element can be formed from one or more materials selected from the group consisting of: cellulose acetate, cardboard, crimped paper such as crimped heat-resistant paper or crimped parchment, and polymeric materials such as low-density polyethylene (LDPE). In a preferred embodiment, the support element is formed from cellulose acetate.

[0233] The aerosol generating apparatus may include an extractor for extracting aerosol-generated articles received in the aerosol generating apparatus, the extractor being configured to move within the apparatus cavity.

[0234] The extractor can be configured to expose an airflow passage when the extractor is in the operating position, which is defined by a heater that is in contact with the aerosol-forming matrix of the aerosol-generating article.

[0235] The extractor includes a container body configured to receive an aerosol-generated article. The container body (extractor body) may include end walls and peripheral walls. The container body includes an open end opposite the end wall through which the aerosol-generated article can be received. The aerosol-generated article is configured to abut the end wall once received within the extractor body. When the aerosol-generated article is received within the extractor, the peripheral wall of the container body may externally connect to the aerosol-generated article. In such embodiments with an extractor, the peripheral wall of the extractor body may define an airflow passage. Alternatively, the peripheral wall of the device housing may define an airflow passage.

[0236] The extractor can be sized such that, in the operating position, the container body extends between the first end of the airflow channel and the distal end of the device cavity. This allows the aerosol-generated article to be directly exposed to the airflow channel without obstructing fluid communication between the airflow channel and the aerosol-generated article by the extractor body.

[0237] The extractor can be sized such that, in the operating position, the container body extends between the orifice end and the distal end of the device cavity. In such embodiments, the extractor body may have slits or multiple slits to allow airflow channels to be exposed to the aerosol-generating article upon insertion. The extractor body and device cavity together can be configured to ensure alignment with the airflow channels or multiple airflow channels during use of the slits or multiple slits. For example, the suction body may include a protrusion arranged to engage with a slot or recess located in the housing of the aerosol-generating device.

[0238] The aerosol generating apparatus may include an elongated heater arranged to be inserted into the aerosol generating article when it is received within the apparatus cavity. The elongated heater may be arranged together with the apparatus cavity. The elongated heater may extend into the apparatus cavity. Optional heating devices are further discussed below. However, in such embodiments where the heater extends into the apparatus cavity, the extractor body includes an orifice at its end wall to allow the heater to extend into the aerosol generating article. Such an orifice allows air to enter the interior of the extractor cavity, allowing air to flow through the aerosol-forming matrix strip of the aerosol generating article during use. Alternatively, additional orifices may be provided to allow air to enter the interior of the extractor cavity.

[0239] In some embodiments, the length of the extractor body may be less than the length of the device cavity. In such embodiments, when the extractor is in the operating position (when the extractor is adjacent to the distal end of the device cavity), the airflow passage may be defined by a portion of the peripheral wall of the device housing that does not define the extractor. This portion of the peripheral wall may define the airflow passage when the extractor is in the operating position. In practice, said portion of the peripheral wall of the device housing may extend longitudinally through the extractor to define the airflow passage. The gap or clearance between the aerosol generating article and the peripheral wall of the device housing defines the airflow passage.

[0240] In embodiments providing an extractor, the airflow channel may be defined between the peripheral wall of the aerosol generating device housing and the outer surface of the extractor. Alternatively, the airflow channel may be defined within the extractor body. The airflow channel may be defined within the peripheral wall of the extractor body. The airflow channel may be defined within the thickness of the peripheral wall of the extractor body. The airflow channel may extend along the length of the extractor body. The airflow channel may extend from a longitudinal position away from the end wall of the extractor body to a longitudinal position near or located at the open end of the extractor body.

[0241] In embodiments where no extractor is provided, the airflow channel may be limited within the thickness of the peripheral wall of the aerosol generating device housing.

[0242] The heater may include an elongated heating element configured to penetrate the aerosol-forming matrix strip when the aerosol-generating article is received within the aerosol-generating apparatus.

[0243] The heater can be of any suitable type. The heater can internally heat the aerosol-generating article. Alternatively, the heater can externally heat the aerosol-generating article. When inserted into or received in an aerosol-generating apparatus, such an external heater can define the aerosol-generating article.

[0244] In some embodiments, the heater is arranged to heat the outer surface of the aerosol forming matrix. In some embodiments, the heater is arranged to insert into the aerosol forming matrix when it is received within the cavity. The heater may be positioned within the cavity. The heater may extend into the cavity. The heater may be an elongated heater. The elongated heater may be blade-shaped. The elongated heater may be pin-shaped. The elongated heater may be conical. In some embodiments, the aerosol generating apparatus includes an elongated heater arranged to insert into the aerosol generating article when it is received within the cavity.

[0245] The heater may include at least one heating element. The at least one heating element can be of any suitable type. In some embodiments, the device includes only one heating element. In some embodiments, the device includes multiple heating elements. The heater may include at least one resistance heating element. Preferably, the heater includes multiple resistance heating elements. Preferably, the resistance heating elements are electrically connected in parallel. Advantageously, providing multiple resistance heating elements electrically connected in parallel facilitates the delivery of desired power to the heater while reducing or minimizing the voltage required to deliver the desired power. Advantageously, reducing or minimizing the voltage required to operate the heater facilitates reducing or minimizing the physical size of the power supply.

[0246] Suitable materials for forming at least one resistance heating element include, but are not limited to: semiconductors, such as doped ceramics, electrically "conductive" ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic and metallic materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, alloys containing nickel, cobalt, chromium, aluminum-titanium-zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese, and iron, as well as alloys based on nickel, iron, cobalt, stainless steel, and... Superalloys based on iron-manganese-aluminum alloys.

[0247] In some embodiments, at least one resistance heating element includes one or more imprinted portions of a resistive material (such as stainless steel). Alternatively, at least one resistance heating element may include a heating wire or filament, such as a Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wire.

[0248] In some embodiments, at least one heating element includes an electrically insulating substrate, wherein at least one resistance heating element is disposed on the electrically insulating substrate.

[0249] The electrically insulating substrate can comprise any suitable material. For example, the electrically insulating substrate can comprise one or more of the following: paper, glass, ceramics, anodized metals, coated metals, and polyimide. Ceramics can comprise mica, alumina (Al₂O₃), or zirconium oxide (ZrO₂). Preferably, the electrically insulating matrix has a thermal conductivity of less than or equal to about 40 W / m·Kelvin, preferably less than or equal to about 20 W / m·Kelvin, and ideally less than or equal to about 2 W / m·Kelvin.

[0250] The heater may include a heating element comprising a rigid electrically insulating substrate having one or more conductive tracks or wires disposed on its surface. The size and shape of the electrically insulating substrate may allow it to be directly inserted into the aerosol-forming matrix. If the electrically insulating substrate is not rigid enough, the heating element may include additional reinforcement. Current may pass through one or more conductive tracks to heat the heating element and the aerosol-forming matrix.

[0251] In some embodiments, the heater includes an induction heating device. The induction heating device may include an inductor coil and a power supply configured to provide a high-frequency oscillating current to the inductor coil. As used herein, the term "high-frequency oscillating current" means an oscillating current with a frequency between 500 kHz and 30 MHz. Advantageously, the heater may include a DC / AC inverter for converting DC current supplied by a DC power supply into alternating current. The inductor coil may be arranged to generate a high-frequency oscillating electromagnetic field upon receiving the high-frequency oscillating current from the power supply. The inductor coil may be arranged to generate a high-frequency oscillating electromagnetic field within a device cavity. In some embodiments, the inductor coil may substantially define the device cavity. The inductor coil may extend at least partially along the length of the device cavity.

[0252] The heater may include an induction heating element. The induction heating element may be a sensor element. As used herein, the term "sensor element" refers to an element comprising a material capable of converting electromagnetic energy into heat. When the sensor element is located in an alternating electromagnetic field, the sensor is heated. The heating of the sensor element may be a result of at least one of hysteresis losses and eddy currents induced in the sensor, depending on the electrical and magnetic properties of the sensor material.

[0253] The sensor element can be arranged such that when the aerosol generating article is received in the cavity of the aerosol generating apparatus, the oscillating electromagnetic field generated by the sensor coil induces a current in the sensor element, thereby causing the sensor element to heat up. In these embodiments, the aerosol generating apparatus is preferably capable of generating a fluctuating electromagnetic field with a magnetic field strength (H field strength) between 1 kA / m and 5 kA / m, preferably between 2 kA / m and 3 kA / m, for example, about 2.5 kA / m. Preferably, the electrically operated aerosol generating apparatus is capable of generating a fluctuating electromagnetic field with a frequency between 1 MHz and 30 MHz, for example, between 1 MHz and 10 MHz, for example, between 5 MHz and 7 MHz.

[0254] In some embodiments, the receptor element is located within the aerosol-generating article. In these embodiments, the receptor element is preferably positioned in contact with the aerosol-forming matrix. The receptor element may be located within the aerosol-forming matrix.

[0255] In some embodiments, the receptor element is located within the aerosol generating apparatus. In these embodiments, the receptor element may be located within a cavity. The aerosol generating apparatus may include only one receptor element. Alternatively, the aerosol generating apparatus may include multiple receptor elements.

[0256] In some embodiments, the receptor element is arranged to heat the outer surface of the aerosol forming matrix. In some embodiments, the receptor element is arranged to be inserted into the aerosol forming matrix when it is received within the cavity.

[0257] The receptor element may comprise any suitable material. The receptor element can be formed from any material capable of being inductively heated to a temperature sufficient to release volatile compounds from the aerosol-forming matrix. Suitable materials for elongated receptor elements include graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, nickel-containing compounds, titanium, and composites of metallic materials. Some receptor elements comprise metals or carbon. Advantageously, the receptor element may comprise or be composed of ferromagnetic materials, such as ferritic iron, ferromagnetic alloys (e.g., ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrites. Suitable receptor elements may be aluminum or include aluminum. The receptor element preferably comprises more than about 5%, preferably more than about 20%, more preferably more than about 50%, or more than about 90% ferromagnetic or paramagnetic material. Some elongated receptor elements can be heated to temperatures exceeding about 250 degrees Celsius.

[0258] The sensor element may include a non-metallic core on which a metallic layer is disposed. For example, the sensor element may include metallic traces formed on the outer surface of a ceramic core or matrix.

[0259] In some embodiments, the aerosol generating apparatus may include at least one resistance heating element and at least one induction heating element. In some embodiments, the aerosol generating apparatus may include a combination of resistance heating element and induction heating element.

[0260] The aerosol generating device may include a power source. The power source may be a DC power source. In some embodiments, the power source is a battery. The power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium-cobalt battery, a lithium-iron phosphate battery, or a lithium polymer battery. However, in some embodiments, the power source may be another form of charge storage device, such as a capacitor. The power source may require recharging and may have a capacity that allows storing enough energy for one or more user operations, such as one or more aerosol generating experiences. For example, the power source may have sufficient capacity to allow continuous heating of the aerosol forming matrix for approximately six minutes, corresponding to the typical time required to smoke a regular cigarette, or for multiple six-minute periods. In another instance, the power source may have sufficient capacity to allow the inhalation or activation of a predetermined number or discontinuous number of heaters. Attached Figure Description

[0261] Specific embodiments will now be described with reference to the accompanying drawings, in which:

[0262] Figure 1 This is a schematic cross-sectional view of an embodiment of the aerosol generation system according to the present disclosure;

[0263] Figure 2 This is a schematic cross-sectional view of an embodiment of an aerosol-generated article according to the present invention;

[0264] Figure 3 This is a schematic cross-sectional view of an embodiment of the aerosol generation system according to the present disclosure; and

[0265] Figure 4 This is a schematic cross-sectional view of a comparative example of an aerosol generation system. Detailed Implementation

[0266] Figure 1 An aerosol generating system 100 is shown, comprising an aerosol generating apparatus 10 and an aerosol generating article 1. The aerosol generating apparatus 10 includes a housing 4 extending between an inlet end 2 and a distal end (not shown). The housing 4 includes a peripheral wall 6. The peripheral wall 6 defines a device cavity for receiving the aerosol generating article 1. The device cavity is defined by a closed distal end and an open inlet end. The inlet end of the device cavity is located at the inlet end of the aerosol generating apparatus 10. The aerosol generating article 1 is configured to be received through the inlet end of the device cavity and is configured to adjoin the closed end of the device cavity. The length of the device cavity is approximately 25 mm.

[0267] The airflow channel 5 is confined within the peripheral wall 6. The airflow channel 5 extends between the inlet 7 located at the opening end of the aerosol generating device 10 and the outlet 9 located at a position along the distal side of the peripheral wall 6.

[0268] The aerosol generating apparatus 10 further includes a heater (not shown) and a power source (not shown) for supplying power to the heater. A controller (not shown) is also provided to control this power supply to the heater. The heater is configured to heat the aerosol generating article 1 during use when it is received within the apparatus 10.

[0269] The aerosol generating article 1 includes a first air inlet zone 15 and a second air inlet zone 115 positioned along the packaging material 22.

[0270] The first air inlet zone 15 is located approximately 2 mm downstream of the upstream end of the aerosol forming matrix strip 12. Assuming the aerosol forming matrix strip 12 and the hollow support segment 14 are directly adjacent, the second air inlet zone 115 is located approximately 2 mm downstream of the upstream end of the hollow support segment 14 and approximately 2 mm downstream of the downstream end of the aerosol forming matrix strip 12. Therefore, the two air inlet zones 15 and 115 are positioned along and around two different components of the aerosol-generated article 1.

[0271] like Figure 1 and 2 As shown, the first air inlet region 15 and the second air inlet region 115 each include a row of perforations surrounding the article 1 and extending through the packaging material 22. The second air inlet region 115 extends through the peripheral wall of the hollow support segment 14.

[0272] When the aerosol generating article 1 is received within the device cavity, the outlet 9 is configured to align with or cover the first air inlet zone 15. Once received within the device cavity, the upstream end of the aerosol generating article 1 is arranged adjacent to the closed end of the device cavity, such that air drawn through the aerosol generating device 10 does not flow over the upstream end of the aerosol generating article 1. Figure 1 As shown, the air drawn through the aerosol generating device 10 can only enter the aerosol generating product 1 through the first air inlet zone 15 and the second air inlet zone 115.

[0273] Airflow channel 5 is defined along the inner surface of peripheral wall 6. In this embodiment, a portion of airflow channel 5 is configured to cover a first air inlet region 15 and a second air inlet region 115 of aerosol generating article 1. Airflow channel 5 has a length of approximately 23 mm. Figure 1 In the embodiment shown, the entire length of the airflow channel 5 is configured to be covered with the aerosol-generating article 1 when received within the device 10.

[0274] Figure 2 It shows a configuration for use Figure 1 The aerosol generating article 1 in the aerosol generating system 100 shown.

[0275] The aerosol generating article 1 includes an aerosol forming matrix strip 12, a hollow support segment 14, an aerosol cooling element (or segment) 16, and a mouthpiece segment 18. Downstream components of the aerosol forming matrix strip 12 (in this case, the hollow support segment 14, the aerosol cooling element 16, and the mouthpiece segment 18) form the downstream section of the aerosol generating article 1. These four elements are arranged end-to-end, longitudinally aligned, and surrounded by packaging material 22 to form the aerosol generating article 1. Figure 1 The aerosol generating article 1 shown is particularly suitable for use with an electrically operated aerosol generating apparatus 1, which includes a heater for heating the aerosol forming matrix strip 12.

[0276] The aerosol forming matrix strip 12 has a length of approximately 12 mm and a diameter of approximately 7 mm. Strip 12 is cylindrical and has a substantially circular cross-section. Strip 12 comprises sheets of aggregated homogeneous tobacco material. The hollow cellulose acetate tube (hollow support segment) 14 has a length of approximately 8 mm and a peripheral wall thickness of 1 mm.

[0277] The mouthpiece segment 18 comprises a filter segment of 8 denier / filament cellulose acetate tow and has a length of approximately 7 mm. The mouthpiece segment 18 has a diameter of approximately 7 mm. The aerosol cooling element 16 has a length of approximately 18 mm and a diameter of approximately 7 mm.

[0278] As discussed above, the aerosol generating article 1 includes a first air inlet region 15 disposed along the aerosol forming matrix strip 12, at least approximately 2 mm from the upstream end of the aerosol forming matrix strip 12. The first air inlet region 15 is located less than 10 mm from the downstream end of the aerosol forming matrix strip 12 or the upstream end of the hollow support segment 14. The first air inlet region 15 and the second air inlet region 115 define the aerosol generating article 1. That is, the first air inlet region 15 and the second air inlet region 115 surround the entire periphery of the aerosol generating article 1.

[0279] Figure 3An aerosol generation system 200, similar to aerosol generation system 100, is shown. Aerosol generation system 200 includes an aerosol generation device 20 and an aerosol generation article 1, both configured for use together. The aerosol generation device 20 is similar to aerosol generation device 10, but differs in that device 20 includes an airflow passage 205 comprising an inlet 7 and two outlets 9, 19. The first outlet 9 of airflow passage 205 is configured to provide fluid communication between the exterior of aerosol generation device 20 and a first air inlet area 15 of aerosol generation article 1. The second outlet 19 of airflow passage 205 is configured to provide fluid communication between the exterior of aerosol generation device 20 and a second air inlet area 115 of aerosol generation article 1. The first outlet 9 is configured to cover (or overlap) the first air inlet area 15 when article 1 is received within device 20, and the second outlet 19 is configured to cover (or overlap) the second air inlet area 115 when article 1 is received within device 20. The interval or distance between the first outlet 9 and the second outlet 19 can be equal to the distance between the first air inlet zone 15 and the second air inlet zone 115.

[0280] like Figure 1 and 3 As shown, fluid communication between the exterior of the aerosol generating apparatus 10, 20 and the interior of the aerosol generating article 1 is established via two different air inlet zones 15, 115. However, the first air inlet zone 15 is configured to allow more air to pass through than the second air inlet zone 115. In other words, the first air inlet zone 15 is configured to provide a greater level of air intake than the second air inlet zone 115.

[0281] When the article 1 is received in the apparatus 10, 20, and when the upstream end of the article 1 is adjacent to the far end of the apparatus cavity, the first air inlet zone 15 is configured as the main air inlet zone for aerosol generation of the article 1. The second air inlet zone 115 is configured to provide ventilation to the article 1; that is, to ventilate the aerosol flowing from the aerosol forming matrix strip 12 through the hollow support section 14 toward the opening end of the article 1.

[0282] When received within the aerosol generating apparatus 10, 20, the upstream end of the opening of the aerosol generating article 1 is adjacent to the far end of the apparatus cavity to prevent air from flowing through the upstream end of the aerosol generating article 1. Therefore, during use, due to the overlap between the airflow channel 9 and the first air inlet zone 15, most of the air flowing through the airflow channels 5, 205 is configured to flow through the first air inlet zone 15.

[0283] Figure 4A comparative example of an incompatible aerosol generating article 103 for use with the aerosol generating apparatus 10 is shown, which does not have a first air inlet area positioned around the aerosol forming matrix strip. Because article 103 lacks an air inlet area and its upstream end is adjacent to the distal end of the apparatus cavity, air cannot be drawn through article 103.

[0284] like Figure 1 As shown, the aerosol generating device 10 includes an annular airflow channel 5. (As illustrated...) Figure 3 As shown, the aerosol generating device 20 includes at least two elongated airflow channels 205.

Claims

1. An aerosol generating article for generating an aerosol upon heating, the aerosol generating article comprising: Aerosols form the matrix of striations; as well as A filter, positioned downstream of the strip of the aerosol-forming matrix, the filter comprising a hollow tubular segment; The aerosol-forming matrix strip and the filter are assembled within packaging material. The aerosol-generating article includes a first air inlet area and a second air inlet area located on the packaging material, each configured to allow air to enter the interior of the aerosol-generating article. The first air inlet area is positioned along the strip of the aerosol forming matrix, and the second air inlet area is positioned along the hollow tubular segment.

2. The aerosol generating article according to claim 1, wherein the filter of the aerosol generating article includes a mouthpiece segment, the mouthpiece segment including a filter material filter segment disposed downstream of the strip of the aerosol forming matrix, and wherein the hollow tubular segment is located between the mouthpiece segment and the strip of the aerosol forming matrix.

3. The aerosol generating article according to claim 2, wherein the filter of the aerosol generating article includes an aerosol cooling element located between the mouthpiece segment and the hollow tubular segment.

4. The aerosol generating article according to any one of claims 1 to 3, wherein the second air inlet region is located at least 2 mm downstream of the first air inlet region.

5. The aerosol generating article according to any one of claims 1 to 3, wherein the second air inlet region is located at least 12 mm downstream of the first air inlet region.

6. The aerosol generating article according to any one of claims 1 to 3, wherein the first air inlet region is located at least 2 mm downstream of the upstream end of the strip of the aerosol forming matrix.

7. The aerosol generating article according to any one of claims 1 to 3, wherein the second air inlet zone is located at least 2 mm downstream of the upstream end of the hollow tubular segment.

8. The aerosol generating article according to any one of claims 1 to 3, wherein the first air inlet region or the second air inlet region comprises a porous portion of the packaging material.

9. The aerosol generating article according to any one of claims 1 to 3, wherein the first air inlet region or the second air inlet region includes a plurality of orifices extending through the packaging material.

10. The aerosol-generating article of claim 8, wherein the first air inlet region has a porosity of at least 3,000 Kroast units.

11. The aerosol-generating article according to claim 8, wherein the first air inlet region has a porosity of less than 25,000 Kroast units.

12. The aerosol-generating article according to any one of claims 1 to 3, wherein the packaging material of the aerosol-generating article comprises an airtight material.

13. An aerosol generation system comprising an aerosol generation article according to any one of the preceding claims, and an aerosol generation apparatus having a distal end and an inlet end, the aerosol generation system comprising: A housing, the housing defining a device cavity for removably receiving the aerosol-generated article at the inlet end of the aerosol generating apparatus; Heater, the heater being used to heat the aerosol forming matrix when the aerosol generating article is received in the device cavity; as well as An airflow channel extending between a channel inlet and a channel outlet, the airflow channel being configured to establish fluid communication between the interior of the device cavity and the exterior of the aerosol generating device; The aerosol generation system is configured such that when the aerosol generation article is received in the device cavity, fluid communication between the interior of the aerosol generation article and the exterior of the aerosol generation device is established through fluid communication between a first air inlet area of ​​the aerosol generation article received in the device cavity and an airflow channel of the aerosol generation device.

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